CN107129295A - Ceramic feeding powder for preparing automatically cleaning hot-spraying coating and preparation method thereof - Google Patents

Ceramic feeding powder for preparing automatically cleaning hot-spraying coating and preparation method thereof Download PDF

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Publication number
CN107129295A
CN107129295A CN201710141346.7A CN201710141346A CN107129295A CN 107129295 A CN107129295 A CN 107129295A CN 201710141346 A CN201710141346 A CN 201710141346A CN 107129295 A CN107129295 A CN 107129295A
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Prior art keywords
powder
ceramic
addition
ball
feeding
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CN201710141346.7A
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苏培博
鞠鹏飞
宋晓航
沙春生
李崇桂
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Shanghai Aerospace Equipments Manufacturer Co Ltd
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Shanghai Aerospace Equipments Manufacturer Co Ltd
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Priority to CN201710141346.7A priority Critical patent/CN107129295A/en
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Abstract

The invention discloses ceramic feeding powder for preparing automatically cleaning hot-spraying coating and preparation method thereof.The present invention solves that the nanostructured powders material density being currently used on thermal spraying spray gun is low, complex process, the problems such as cost is high in the preparation method of poor fluidity and the nanostructured powder powder material being currently used on thermal spraying spray gun.The ceramic feeding powder of the present invention is made up of ceramic powder and rare earth addition.Ceramic feeding powder mixes powder, drying powder processed, compressing, high temperature sintering, broken powder processed and plasma treatment through ball milling and prepared, and can also mix powder, low temperature drying, high temperature sintering, ball milling slurrying, spray drying and plasma treatment through ball milling be prepared.The ceramic feeding powder consistency of the present invention is high, good fluidity, and preparation method technique is simple, and cost is low, and application is quite varied, with important application value, is expected to produce great economic results in society.

Description

Ceramic feeding powder for preparing automatically cleaning hot-spraying coating and preparation method thereof
Technical field
The present invention relates to ceramic powder field, more particularly to a kind of ceramic feeding for being used to prepare automatically cleaning hot-spraying coating Powder and preparation method thereof.
Background technology
Self-cleaning material refers to that the material of itself clean can be kept under field conditions (factors), material have in itself dust-proof, antibacterial, The multi-functional such as anti-mildew, antifouling.A class advanced ceramics material with self-cleaning performance gradually obtains relatively broad application.Its Middle oxide ceramics, such as titanium oxide, tin oxide, iron oxide, tungsten oxide are widely used as automatic cleaning coating material and are used for improving The surface cleaning performance of material.
Based on self-cleaning material convenience in use and security, scientists are carried out around self-cleaning material Extensive research, trial employs multiple material system, and develops some general technologies of preparing.At present, it is existing a variety of Method can be used for preparing self-cleaning material.Wherein, there are sol-gel process, plasma method, self assembly using more method Method and electrodeposition process etc..In terms of current present Research, prepared using sol-gel process after automatic cleaning coating, generally require into Row high-temperature calcination handle, to improve the adhesive force of coating and base material, this aftertreatment technology be limited by equipment or device shape and Size, and high-temperature process may bring adverse effect to the performance of device.There is also similar for other several methods Limitation.
Spraying process is a kind of effective ways for preparing automatic cleaning coating, and wherein plasma spraying and liquid phase spraying technology is most suitable Preferably it is used to prepare this type coating.The characteristics of spray gun based on paint finishing has high temperature and high speed, spraying technology was prepared in coating There is the advantage of fast hot rapid cooling in journey, thus with unique advantage in terms of nano ceramics is prepared.But this technical method mesh The preceding deficiency existed in terms of nano coating is prepared is mainly single nano powder and cannot be directly used to spray treatment, before this Also need to carry out nano-powder reconstruction grain processing.
Because common nano powder size is small, light weight, is easily dispelled or be ablated off by thermal-flame by air-flow, therefore can not be direct For thermal spraying.This support special education of Kang Zhou universities of the U.S. is awarded with the karr professor of Rutgers university and to study cashier first in nineteen ninety-five The prilling process again at ground rice end, makes the dusty material with nanostructured can be used on traditional thermal spraying spray gun, so that Prepare nanostructured hot-spraying coating to be possibly realized, the preparation method of the dusty material of the nanostructured is：
(a) nano structural material is dispersed in liquid medium using ultrasound；
(b) organic binder bond is added in above-mentioned medium and forms it into solution；
(c) obtained solution is spray-dried, so that nanostructured aggregate is made；
(d) by nanostructured aggregate can effectively exclude residual moisture, remove absorption and chemical absorbing oxygen and Promote to partially sinter or internal combustion at a temperature of heating obtain can be used in the powder of nanostructured on traditional thermal spraying spray gun Powder material.
Although the nanostructured powder powder material that this method is obtained has regular spherical, remain with and receive inside feed pellet Rice crystal grain, and with preferable consistency and mobility, available for nanostructured thermal spraying is made on traditional thermal spraying spray gun Coating；But this method is in order to improve the consistency of ceramic feeding, using the high temperature loose sintering twice, Ran Houyou of reuniting twice Plasma treatment is carried out, this method requires high to equipment performance, and complex process prepares cost higher, it is difficult to produced in batches.
The content of the invention
The problem of present invention is solved is existing fine and close for the nanostructured automatically cleaning dusty material on thermal spraying spray gun Spend low, poor fluidity；The preparation method complex process for the nanostructured powder powder material being currently used on thermal spraying spray gun, cost It is high；To solve described problem, the present invention provides a kind of for preparing ceramic feeding powder of automatic cleaning coating and preparation method thereof.
The present invention is provided to prepare the ceramic feeding powder of automatically cleaning hot-spraying coating, it is characterised in that by 87%~ 98% ceramic powder, 1%~15.5% cermet additive and 1%~9.5% rare earth addition are made.
Further, ceramic powder is one or more of mixtures in metallic compound, transistion metal compound, ceramic powder Granularity be nanoscale or micron order.
Further, metallic compound be metal oxide, metal sulfide in one kind or wherein several combinations, wherein Metal in metallic compound is aluminium, tin or tungsten.
Further, transistion metal compound is one kind or wherein several in transition metal oxide, transient metal sulfide The combination planted, the wherein transition metal in transistion metal compound are iron, zinc, titanium or zirconium.
Further, cermet additive be fully stabilized zirconia or PSZ, wherein, partially stabilized oxidation Zirconium is the zirconium oxide of stabilized with yttrium oxide and/or the zirconium oxide of ceria stabilized.
Further, rare earth addition is rare earth oxide, one kind in rare earth element nitride or wherein several Combination；Its rare earth elements is yttrium, lanthanum, cerium or neodymium.
The present invention also provides described ceramic feeding raw powder's production technology, including：Step 1: weighing by mass percentage 87%~98% ceramic powder, 1%~15.5% cermet additive and 1%~9.5% rare earth addition, are mixed into Mixture；Step 2: the mixture is placed in ball mill, then water and binding agent progress ball milling are added into ball mill, controlled The rotating speed of ball mill processed is 100~200r/min, and ratio of grinding media to material is 3:1~5:1, Ball-milling Time is 360~600min, wherein, water Addition be the 40%~55% of mixture gross mass, the addition of binding agent is the 3%~4% of mixture gross mass；Step Rapid three, slurry prepared by step 2 is placed in 60~70 DEG C of baking oven and dried, then entered at a temperature of 1050~1150 DEG C Row high temperature sintering obtains ceramic particle；Step 4: addition water and binding agent are placed in ball mill into the ceramic particle of step 3 Ball milling mixing is carried out, the rotating speed for controlling ball mill is 100~200r/min, and ratio of grinding media to material is 3:1~5:1, Ball-milling Time be 360~ 600min；Wherein, the addition of water is the 40%~55% of ceramic particle gross mass, and the addition of binding agent is that ceramic particle is total The 3%~4% of quality；Step 5: the mixture obtained after step 4 ball milling be spray-dried obtaining ceramic powder, control spray The inlet temperature of mist drying tower is 190~210 DEG C, and the outlet temperature of spray drying tower is 90~100 DEG C, mist in spray drying tower The rotating speed for changing disk is 18000~19000r/min；Step 6: the ceramic powder obtained to step 5 is in 1050~1150 DEG C of high temperature Sintering processes or plasma treatment obtain ceramic feeding powder.
Further, the binding agent in step 2 and step 4 is polyvinyl alcohol.
The present invention also provides described ceramic feeding raw powder's production technology, including：Step 1: weighing by mass percentage 87%~98% ceramic powder, 1%~15.5% cermet additive and the mixing of 1%~9.5% rare earth addition；Step Rapid two, the mixture of step one is placed in ball mill, then water and binding agent progress ball milling is added into ball mill, control ball milling The rotating speed of machine is 100~200r/min, and ratio of grinding media to material is 3:1~5:1, Ball-milling Time is 360~600min, wherein, the addition of water Measure as the 40%~55% of mixture gross mass, the addition of binding agent is the 3%~4% of mixture gross mass；3rd, by step Two slurries prepared, which are placed in 60~70 DEG C of baking oven, dries, and it is 80~90 that then slurry, which is placed in pulverizer, and is crushed to granularity Purpose ceramic powder；Step 4: the ceramic powder of step 3 is placed in into the mould that a diameter of 30~40mm, depth are 9~12mm In, compressing with forcing press, the forming pressure of forcing press is 22~26MPa；5th, base substrate compressing in step 4 is placed in In cold isostatic press, the pressure of cold isostatic press is 210~230MPa, and the time is 2~3min, then places into 1050~1150 High temperature sintering is carried out at a temperature of DEG C and obtains ceramic block, the sintering processes time is 300~700min；Step 6: by step 5 In ceramic block be placed in initial crusher and be crushed to particle diameter for 90~105 μm, be then placed on airslide disintegrating mill and crush again Obtain the ceramic powder that particle diameter is 20~50 μm；7th, it is to obtain ceramics to feed that the ceramic powder in step 6, which carries out plasma treatment, Feed powder body.
Further, the binding agent in step 2 and step 4 is polyvinyl alcohol.
The ceramic feeding powder of the present invention through ball milling mix powder, dry powder processed, compressing, high temperature sintering, broken powder processed and Prepared by plasma treatment, this method only need to be by being once spray-dried, once sintered processing, is used for thermal spraying with existing The method of nanostructured powder powder material on spray gun is compared, and simplifies manufacture craft, and equipment performance requires low, greatly reduced Cost of manufacture, ceramic feeding powder of the invention can also mix powder, low temperature drying, high temperature sintering, ball milling slurrying, spraying through ball milling Dry and be prepared by plasma treatment, this method is simple to operate, low manufacture cost, this method is adapted to make large batch of be used for Nanostructured automatically cleaning dusty material on thermal spraying spray gun.
The self-cleaning ceramic feeding powder preparation method technique being used on thermal spraying spray gun of the present invention is simple, to equipment It is required that it is low, cost is greatly reduced, the present invention, which makes, obtains the mobility of ceramic feeding powder for 49~55g/min, vibration density Spend for 2.5~2.7g/cm3, the present invention, which makes, obtains ceramic feeding powder consistency height, good fluidity.
Having a wide range of application for the material of the present invention, can be widely applied to many zero of the industries such as aerospace industry, chemical industry, medical treatment Part.
Brief description of the drawings
The exterior appearance photo for the ceramic feeding powder that Fig. 1 provides for 21st embodiment of the invention；
The macrograph for the ceramic feeding powder cross section that Fig. 2 provides for 21st embodiment of the invention；
Fig. 3 is the ceramic coating that the ceramic feeding powder that 21st embodiment of the invention is obtained is obtained by thermal spraying XRD spectrum；
Fig. 4 is the ceramic coating that the ceramic feeding powder that 22nd embodiment of the invention is obtained is obtained by thermal spraying XRD collection of illustrative plates；
Fig. 5 is the ceramic coating that the ceramic feeding powder that 22nd embodiment of the invention is obtained is obtained by thermal spraying Cross section SEM photograph.
Embodiment
Hereinafter, spirit and substance of the present invention are further elaborated in conjunction with the accompanying drawings and embodiments.The technology of the present invention side Case is not limited to act specific embodiment set forth below, in addition to any combination between each specific embodiment.
The ceramic feeding powder provided in an embodiment of the present invention for being used to prepare automatically cleaning hot-spraying coating is by mass percent Constitute as 87%~98% ceramic powder, 1%~15.5% cermet additive and 1%~9.5% rare earth addition It is made.
First embodiment：The present embodiment ceramics feeding powder be by mass percentage by 89%~98% ceramic powder, 3% ~15.5% cermet additive and 3%~9.5% rare earth addition are made.Ceramic powder be metallic compound and/or Transistion metal compound, the granularity of ceramic powder is nanoscale or micron order；When ceramic powder is mixture, it can be pressed between various ceramic powders Any ratio mixing.Metallic compound is the one or more in metal oxide or metal sulfide, and metallic compound is mixing During thing, it can be mixed by any ratio between various metallic compounds.Described transistion metal compound is transition metal oxide, various It can be mixed by any ratio between transistion metal compound.The cermet additive is fully stabilized zirconia or partially stabilized oxidation Zirconium, wherein, PSZ is the zirconium oxide of stabilized with yttrium oxide and/or the zirconium oxide of ceria stabilized.Partially stabilized oxygen When changing zirconium for mixture, it can be mixed by any ratio between various PSZs.The rare earth addition is rare earth element oxygen Compound.Other are identical with specific embodiment five.It can be mixed by any ratio between various part rare earth additions.
The present embodiment, which makes, obtains ceramic feeding powder consistency height, good fluidity, and the mobility of ceramic feeding powder is 49~55g/min, tap density is 2.5~2.7g/cm3.Make and obtain the grain diameter of ceramic feeding powder for 3~300 μm, The size of nanocrystalline crystal grain in the particle of wherein ceramic feeding powder is 5~500nm.
The ceramic feeding powder of the present embodiment has high intensity, high rigidity, higher elasticity and toughness, good automatically cleaning Performance；The ceramic feeding powder characteristic of the present embodiment is superior, can regard the ceramic feeding powder of the present embodiment as thermal spraying feeding Self-cleaning ceramic coating is made, the application field of nano ceramic material is expanded.
Ceramic feeding powder is by 93%~96% ceramic powder, 2% by mass percentage in second embodiment, the present embodiment ~15% cermet additive and 2%~8.2% rare earth addition are made.
3rd embodiment, ceramic feeding powder is by 90% ceramic powder, 10% cermet additive by mass percentage It is made with 5% rare earth addition.Other are identical with specific embodiment one.
The present invention also provides the ceramic feeding raw powder's production technology.
3rd embodiment
Including：Step 1: weighing 87%~98% ceramic powder, 1%~15.5% cermet by mass percentage Additive and the mixing of 1%~9.5% rare earth addition；Step 2: the mixture of step one is placed in ball mill, then to ball Water is added in grinding machine and binding agent carries out ball milling, the rotating speed for controlling ball mill is 100~200r/min, and ratio of grinding media to material is 3:1~5: 1, Ball-milling Time is 360~600min, wherein, the addition of water is the 40%~55% of mixture gross mass, binding agent plus It is the 3%~4% of mixture gross mass to enter amount；Dried Step 3: slurry prepared by step 2 is placed in 60~70 DEG C of baking oven It is dry, high temperature sintering is then carried out at a temperature of 1050~1150 DEG C and obtains ceramic particle；Step 4: to the ceramic broken of step 3 Water is added in material and binding agent is placed in ball mill and carries out ball milling mixing, and the rotating speed for controlling ball mill is 100~200r/min, ball Material is than being 3:1~5:1, Ball-milling Time is 360~600min；Wherein, the addition of water be ceramic particle gross mass 40%~ 55%, the addition of binding agent is the 3%~4% of ceramic particle gross mass；Step 5: the mixture obtained after step 4 ball milling Progress is spray-dried obtains ceramic powder, and the inlet temperature for controlling spray drying tower is 190~210 DEG C, and spray drying tower goes out Mouth temperature is 90~100 DEG C, and the rotating speed of atomizing disk is 18000~19000r/min in spray drying tower；Step 6: step 5 Ceramic powder is handled through 1050~1150 DEG C of high temperature sinterings or plasma treatment is to obtain ceramic feeding powder.The present embodiment makes Obtain ceramic feeding powder consistency high, good fluidity, the mobility of ceramic feeding powder is 49~55g/min, tap density For 2.5~2.7g/cm3。
The present embodiment, which makes, obtains the grain diameter of ceramic feeding powder for 3~300 μm, wherein of ceramic feeding powder The size of nanocrystalline crystal grain in grain is 5~500nm.
The manufacture craft of the present embodiment is simple, and cost is low.
The ceramic feeding powder characteristic that the present embodiment making is obtained is superior, and obtained ceramics can be made using the present embodiment and are fed Self-cleaning ceramic coating is made through thermal spraying in feed powder body, expands the application field of nano ceramic material.
Further, the binding agent in step 2 and step 4 is polyvinyl alcohol.Other steps and parameter and specific implementation Example nine is identical.
Fourth embodiment：The present embodiment ceramics feeding powder is followed the steps below：First, weigh by mass percentage 87%~98% ceramic powder, 1%~15.5% cermet additive and the mixing of 1%~9.5% rare earth addition； 2nd, the mixture of step one is placed in ball mill, then water and binding agent progress ball milling is added into ball mill, control ball mill Rotating speed be 100~200r/min, ratio of grinding media to material is 3:1~5:1, Ball-milling Time is 360~600min, wherein, the addition of water For the 40%~55% of mixture gross mass, the addition of binding agent is the 3%~4% of mixture gross mass；3rd, by step 2 The slurry of preparation is placed in 60~70 DEG C of baking oven and dried, and then slurry is placed in pulverizer and is crushed to granularity for 80~90 mesh Ceramic powder；4th, the ceramic powder of step 3 is placed in the mould that a diameter of 30~40mm, depth are 9~12mm, with pressure Power machine is compressing, and the forming pressure of forcing press is 22~26MPa；5th, base substrate compressing in step 4 is placed in cold etc. quiet In press, the pressure of cold isostatic press is 210~230MPa, and the time is 2~3min, then places into 1050~1150 DEG C of temperature The lower high temperature sintering that carries out of degree obtains ceramic block, and the sintering processes time is 300~700min；6th, by the ceramic block in step 5 Body, which is placed in initial crusher, is crushed to particle diameter for 90~105 μm, is then placed on airslide disintegrating mill to crush again and obtains particle diameter and be 20~50 μm of ceramic powder；7th, it is to obtain ceramic feeding powder that the ceramic powder in step 6, which carries out plasma treatment,.
The model of cold isostatic press is LDJ-200/600/300 in the present embodiment step 5.
The present embodiment, which makes, obtains ceramic feeding powder consistency height, good fluidity, and the mobility of ceramic feeding powder is 49~55g/min, tap density is 2.5~2.7g/cm3。
The present embodiment, which makes, obtains the grain diameter of ceramic feeding powder for 3~300 μm, wherein of ceramic feeding powder The size of nanocrystalline crystal grain in grain is 5~500nm.
The technique of the present embodiment is simple, and cost is low.
5th embodiment：
90% ceramic powder, 7% cermet additive and the mixing of 3% rare earth addition are weighed in step one.Other steps And parameter is identical with first embodiment or second embodiment.
The rotating speed that ball mill is controlled in sixth embodiment, step 2 is 300r/min, and ratio of grinding media to material is 3：1, Ball-milling Time is 180min。
7th embodiment：The present embodiment is dried at a temperature of being placed in 85 DEG C with viscous slurry in fourth embodiment step 3, High temperature sintering is carried out at a temperature of the viscous slurry after drying is placed in into 1100 DEG C again and obtains ceramic particle.Other steps and parameter It is identical with fourth embodiment.
8th embodiment：The present embodiment is from controlling the rotating speed of ball mill in step 4 unlike fourth embodiment 400r/min, ratio of grinding media to material is 4:1, Ball-milling Time is 170min.Other steps and parameter are identical with fourth embodiment.
9th embodiment：The present embodiment is the total matter of mixture from the addition of step 4 reclaimed water unlike fourth embodiment The 51% of amount, the addition of binding agent is the 4% of mixture gross mass.Other steps and parameter are identical with fourth embodiment.
The present embodiment binding agent is polyvinyl alcohol.
Tenth embodiment：The inlet temperature that spray drying tower is controlled in the present embodiment step 5 is 210 DEG C, spray drying tower Outlet temperature be 950 DEG C, in spray drying tower the rotating speed of atomizing disk be 20000r/min.
11st embodiment：Ceramic powder obtains ceramic feeding through 1060 DEG C of high temperature sintering processing in the present embodiment step 6 Powder.
12nd embodiment：Ceramic powder is plasma treated in step 6 obtains ceramic feeding powder.
13rd embodiment：Weighed by mass percentage in step one 88% ceramic powder, 8% cermet additive and 4% rare earth addition is mixed.
14th embodiment：The rotating speed that ball mill is controlled in step 2 is 210~320r/min, and ratio of grinding media to material is 4.3：1~ 5.1：1, Ball-milling Time is 150~170min.
15th embodiment：The addition of step 2 reclaimed water is the 58~63% of mixture gross mass, the addition of binding agent Measure as the 4~5% of mixture gross mass.The present embodiment binding agent is polyvinyl alcohol.
16th embodiment：Viscous slurry is dried at a temperature of being placed in 85 DEG C in step 3, then by the sticky material after drying Slurry is placed in pulverizer the ceramic powder for being crushed to that granularity is 100 mesh.
17th embodiment：Ceramic powder is placed in the mould that a diameter of 60mm, depth are 15mm in step 4, uses pressure Machine is compressing, and the forming pressure of forcing press is 40MPa.
18th embodiment：Base substrate is placed in cold isostatic press in step 5, and the pressure of cold isostatic press is 260MPa, when Between be 3min, high temperature sintering is carried out at a temperature of then placing into 1050 DEG C and obtains ceramic block, high temperature sintering processing time is 950min.The model of the present embodiment cold isostatic press is LDJ-200/600/300.
19th embodiment：It is 110 μm, Ran Houzai that ceramic block, which is placed in initial crusher and is crushed to particle diameter, in step 6 The ceramic powder crushed and obtain that particle diameter is 55 μm is placed on airslide disintegrating mill.
20th embodiment：It is to obtain ceramic feeding powder that ceramic powder, which carries out plasma treatment, in step 7.This implementation Example plasma treatment uses plasma gun processing, and plasma gun treatment conditions are spray voltage 50-60V, spraying current 480 ~510A, primary air 70~85SCFH of speed, 60~70SCFH of flow rate of carrier gas, 2~3kg/h of powder feeding rate.
21st embodiment：Including：Step 1: weighing the stabilized with yttrium oxide that nano oxidized titanium valve, molar fraction are 8% Zirconium oxide (8YSZ) and the mixing of nano-cerium oxide powder；Step 2: the mixture of step one is placed in ball mill, then to ball mill Middle addition water and binding agent carry out wet ball grinding and obtain viscous slurry, and the rotating speed for controlling ball mill is 300r/min, and ratio of grinding media to material is 5:1, Ball-milling Time is 150min, wherein, the addition of water is the 65% of mixture gross mass, and the addition of binding agent is mixing The 3% of thing gross mass；Step 3: dried at a temperature of the viscous slurry of step 2 is placed in into 70 DEG C, then will be sticky after drying Slurry carries out high temperature sintering at a temperature of being placed in 1050 DEG C and obtains ceramic particle；Step 4: adding into the ceramic particle of step 3 Enter water and binding agent is placed in ball mill and carries out ball milling mixing, the rotating speed for controlling ball mill is 350r/min, and ratio of grinding media to material is 5：1, Ball-milling Time is 190min；Step 5: the mixture obtained after step 4 ball milling be spray-dried obtaining ceramic powder, control The inlet temperature of spray drying tower is 220 DEG C, and the outlet temperature of spray drying tower is 100 DEG C, atomizing disk in spray drying tower Rotating speed is 20000r/min；Step 6: the ceramic powder of step 5 is handled through 1050 DEG C of high temperature sinterings or plasma treatment is produced To ceramic feeding powder.The particle mean size of nano oxidized titanium valve is 50nm in the present embodiment step one.
Binding agent in the present embodiment step 2 and step 4 is polyvinyl alcohol.The present embodiment makes and obtains ceramic feeding The particle diameter of powder is 350nm.The mobility that the present embodiment makes obtained ceramic feeding powder is 57g/min, and tap density is 2.7g/cm3；The present embodiment makes the exterior appearance photo of obtained ceramic feeding powder as shown in figure 1, the tissue of cross section shines Piece is as shown in Figure 2.As can be seen from Figure 1 the present embodiment make obtained ceramic feeding powder have it is regular spherical；Can from Fig. 2 Nanocrystal is remained with to find out the present embodiment to make inside obtained ceramic feeding powder.
The present embodiment makes obtained ceramic feeding powder and obtains ceramic coating by thermal spraying, and the matrix material of coating is Medium carbon steel, matrix material first passes through blasting treatment before thermal spraying, and thermal spraying uses section of U.S. 9MB plasma spray guns, etc. The control condition of plasma spray rifle is：Predominant gas Ar pressure is 90psi (PSI), secondary gas H2Pressure For 50psi, argon gas flow velocity is 100SCFH, and dust carrier flow velocity is 30 to 60SCFH, and powder feeding rate is 2.0lb/hr, plasma spray Painting electric current is 500A, and plasma spraying voltage is 55V.The XRD spectrum of ceramic coating is as shown in Figure 3.
22nd embodiment：Including：Step 1: weighing the stabilized with yttrium oxide that nano oxidized titanium valve, molar fraction are 8% Zirconium oxide (8YSZ) and the mixing of nano-cerium oxide powder；Step 2: the mixture of step one is placed in ball mill, then to ball mill Middle addition water and binding agent carry out wet ball grinding and obtain viscous slurry, and the rotating speed for controlling ball mill is 220r/min, and ratio of grinding media to material is 7：1, Ball-milling Time is 110min, wherein, the addition of water is the 60% of mixture gross mass, and the addition of binding agent is mixing The 3% of thing gross mass；Step 3: dried at a temperature of the viscous slurry of step 2 is placed in into 70 DEG C, then will be sticky after drying Slurry carries out high temperature sintering at a temperature of being placed in 1100 DEG C and obtains ceramic particle；Step 4: adding into the ceramic particle of step 3 Enter water and binding agent is placed in ball mill and carries out ball milling mixing, the rotating speed for controlling ball mill is 150r/min, and ratio of grinding media to material is 6：1, Ball-milling Time is 110min；Step 5: the mixture obtained after step 4 ball milling be spray-dried obtaining ceramic powder, control The inlet temperature of spray drying tower is 220 DEG C, and the outlet temperature of spray drying tower is 100 DEG C, atomizing disk in spray drying tower Rotating speed is 20000r/min；Step 6: the ceramic powder of step 5 carries out plasma treatment with plasma gun obtains ceramics Feeding powder.The mobility that its present embodiment makes obtained ceramic feeding powder is 57g/min, and tap density is about 2.5g/cm3。
The present embodiment makes obtained ceramic feeding powder and obtains ceramic coating by thermal spraying, and matrix material is low-carbon Steel, matrix material first passes through blasting treatment before thermal spraying, and thermal spraying uses section of U.S. 9MB plasma spray guns, plasma The control condition of spray gun is：Predominant gas Ar pressure is 90psi (PSI), secondary gas H2Pressure be 50psi, argon gas flow velocity is 100SCFH, and dust carrier flow velocity is 30 to 60SCFH, and powder feeding rate is 3b/hr, plasma spraying electric current For 550A, plasma spraying voltage is 60V.The XRD spectrum of ceramic coating is as shown in Figure 4.
The present embodiment makes obtained ceramic feeding powder and obtains ceramic coating by thermal spraying, and the matrix material of coating is Medium carbon steel, matrix material first passes through blasting treatment before thermal spraying, and thermal spraying uses section of U.S. 9MB plasma spray guns.Fig. 5 For the SEM photograph of cross section.
23rd embodiment：Nano oxidized titanium valve, nano-cerium oxide powder and nano oxygen are weighed in the present embodiment step one Change zirconium powder mixing.The particle mean size of the present embodiment nano titania is about 50nm.The present embodiment makes obtained ceramics and fed The mobility of feed powder body is 57.1g/min, and tap density is 2.4g/cm3.The present embodiment makes the grain for obtaining ceramic feeding powder Footpath is 270nm.
24th embodiment：Nano titania, nano-cerium oxide powder and nano oxidized zirconium powder are weighed in step one Mixing.Other steps and parameter are identical with specific embodiment nine or 35.The present embodiment makes obtained ceramic feeding powder Mobility be 56.9g/min, tap density is 2.5g/cm3.The present embodiment, which makes, to be obtained the particle diameter of ceramic feeding powder and is 420nm。
Resulting ceramic feeding powder obtains ceramic coating wherein by thermal spraying, and the matrix material of coating is 45 Steel, spraying before cleaning and sandblast have been carried out to matrix, thermal spraying uses section of U.S. 9MB plasma spray systems, wait from The GM-Fanuc 6-axis manipulators that son spraying is controlled by computer are operated, and the thickness of coating is 320 μm, spraying Parameter is：Main gas Ar pressure 0.49MPa, secondary gas H2Pressure 0.28MPa, main gas Ar flow velocitys are 70~100scfh, spraying Electric current 500A, 45~60V of spray voltage, powder feeding rate 3lb/hr.

Claims (10)

1. for preparing the ceramic feeding powder of automatically cleaning hot-spraying coating, it is characterised in that by 87%~98% ceramic powder, 1%~15.5% cermet additive and 1%~9.5% rare earth addition are made.
2. ceramic feeding powder according to claim 1, it is characterised in that ceramic powder is metallic compound, transition metal One or more of mixtures in compound, the granularity of ceramic powder is nanoscale or micron order.
3. ceramic feeding powder according to claim 2, it is characterised in that metallic compound is metal oxide, metal One kind or wherein several combinations in sulfide, the wherein metal in metallic compound are aluminium, tin or tungsten.
4. ceramic feeding powder according to claim 2, it is characterised in that transistion metal compound is transiting metal oxidation One kind or wherein several combinations in thing, transient metal sulfide, the wherein transition metal in transistion metal compound be iron, Zinc, titanium or zirconium.
5. ceramic feeding powder according to claim 1, it is characterised in that cermet additive is fully stabilized zirconia Or PSZ, wherein, PSZ is the zirconium oxide of stabilized with yttrium oxide and/or the oxidation of ceria stabilized Zirconium.
6. ceramic feeding powder according to claim 1, it is characterised in that rare earth addition be rare earth oxide, One kind or wherein several combinations in rare earth element nitride；Its rare earth elements is yttrium, lanthanum, cerium or neodymium.
7. the ceramic feeding raw powder's production technology in claim 1 to 6 described in any one, it is characterised in that including：Step First, 87%~98% ceramic powder, 1%~15.5% cermet additive and 1%~9.5% are weighed by mass percentage Rare earth addition, mix resulting mixture；Step 2: the mixture is placed in ball mill, then add into ball mill water Ball milling is carried out with binding agent, the rotating speed for controlling ball mill is 100~200r/min, and ratio of grinding media to material is 3:1~5:1, Ball-milling Time is 360~600min, wherein, the addition of water is the 40%~55% of mixture gross mass, and the addition of binding agent is mixture The 3%~4% of gross mass；Dried Step 3: slurry prepared by step 2 is placed in 60~70 DEG C of baking oven, then 1050 High temperature sintering is carried out at a temperature of~1150 DEG C and obtains ceramic particle；Step 4: into the ceramic particle of step 3 add water and Binding agent, which is placed in ball mill, carries out ball milling mixing, and the rotating speed for controlling ball mill is 100~200r/min, and ratio of grinding media to material is 3:1~ 5:1, Ball-milling Time is 360~600min；Wherein, the addition of water is the 40%~55% of ceramic particle gross mass, binding agent Addition be the 3%~4% of ceramic particle gross mass；Done Step 5: the mixture obtained after step 4 ball milling carries out spraying Dry to obtain ceramic powder, the inlet temperature for controlling spray drying tower is 190~210 DEG C, and the outlet temperature of spray drying tower is 90 ~100 DEG C, the rotating speed of atomizing disk is 18000~19000r/min in spray drying tower；Step 6: the ceramics obtained to step 5 Powder is handled in 1050~1150 DEG C of high temperature sinterings or plasma treatment obtains ceramic feeding powder.
8. ceramic feeding raw powder's production technology according to claim 7, it is characterised in that in step 2 and step 4 Binding agent is polyvinyl alcohol.
9. the ceramic feeding raw powder's production technology in claim 1 to 6 described in any one, it is characterised in that including：Step First, 87%~98% ceramic powder, 1%~15.5% cermet additive and 1%~9.5% are weighed by mass percentage Rare earth addition mixing；Step 2: the mixture of step one is placed in ball mill, then addition water and bonding into ball mill Agent carries out ball milling, and the rotating speed for controlling ball mill is 100~200r/min, and ratio of grinding media to material is 3:1~5:1, Ball-milling Time be 360~ 600min, wherein, the addition of water is the 40%~55% of mixture gross mass, and the addition of binding agent is mixture gross mass 3%~4%；3rd, slurry prepared by step 2 is placed in 60~70 DEG C of baking oven and dried, slurry is then placed in pulverizer In be crushed to granularity be 80~90 mesh ceramic powder；Step 4: by the ceramic powder of step 3 be placed in a diameter of 30~40mm, Depth is in 9~12mm mould, compressing with forcing press, the forming pressure of forcing press is 22~26MPa；5th, step 4 In compressing base substrate be placed in cold isostatic press, the pressure of cold isostatic press is 210~230MPa, and the time is 2~3min, Then high temperature sintering is carried out at a temperature of placing into 1050~1150 DEG C and obtains ceramic block, the sintering processes time is 300~ 700min；Particle diameter is crushed to for 90~105 μm Step 6: the ceramic block in step 5 is placed in initial crusher, then The ceramic powder crushed obtain particle diameter be 20~50 μm is placed on airslide disintegrating mill again；7th, the ceramic powder in step 6 is carried out Plasma treatment is to obtain ceramic feeding powder.
10. ceramic feeding raw powder's production technology according to claim 9, it is characterised in that in step 2 and step 4 Binding agent is polyvinyl alcohol.
CN201710141346.7A 2017-03-10 2017-03-10 Ceramic feeding powder for preparing automatically cleaning hot-spraying coating and preparation method thereof Pending CN107129295A (en)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN109440051A (en) * 2018-11-27 2019-03-08 陈涛 A kind of alumina ceramic coating and preparation method thereof
CN109778102A (en) * 2019-02-27 2019-05-21 中国科学院上海硅酸盐研究所 A kind of multilayered structure selfreparing thermal barrier coating and preparation method thereof
CN116023136A (en) * 2023-01-19 2023-04-28 北京理工大学 Nano-structure rare earth hafnate ceramic powder feed for thermal spraying and preparation method and application thereof

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JPH02290245A (en) * 1989-04-28 1990-11-30 Fujikura Ltd Manufacture of powder material
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109440051A (en) * 2018-11-27 2019-03-08 陈涛 A kind of alumina ceramic coating and preparation method thereof
CN109778102A (en) * 2019-02-27 2019-05-21 中国科学院上海硅酸盐研究所 A kind of multilayered structure selfreparing thermal barrier coating and preparation method thereof
CN116023136A (en) * 2023-01-19 2023-04-28 北京理工大学 Nano-structure rare earth hafnate ceramic powder feed for thermal spraying and preparation method and application thereof
CN116023136B (en) * 2023-01-19 2024-02-09 北京理工大学 Nano-structure rare earth hafnate ceramic powder feed for thermal spraying and preparation method and application thereof

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