CN105039967A - Metallic nickel ceramic coating with excellent thermal shock resistance and manufacturing method thereof - Google Patents

Abstract

The invention discloses a metallic nickel ceramic coating with excellent thermal shock resistance. The surface of matrix metal is coated with the ceramic coating manufactured by selecting metallic nickel as a metallic matrix and adopting refractory materials such as zinc oxide and vanadium diboride as ceramic phases. Alloying elements in the matrix metal diffuse towards the interface and are subjected to interfacial reactions with substances such as NiO in the coating, wherein one interfacial reaction follows the equation that NiO+M->MO+Ni. Reduced and precipitated active nickel atoms and the matrix metal M form Ni-M metallic bonds. Thus, the adherence of the metallic ceramic coating and the matrix metal is improved. Moreover, because rare-earth nano cerium dioxide is high in activity, the atomic orbital interaction of the rare-earth nano cerium dioxide with absorbed molecules is improved, the reactions are enhanced, adherence can be built soon, and added boron powder and nickel powder are combined so that the permeability of the coating can be improved. A manufacturing process of the metallic nickel ceramic coating is simple. The manufactured coating has the advantages of being excellent in thermal shock resistance, resistant to corrosion and the like.

Description

Metallic nickel ceramic coating that a kind of thermal shock resistance is good and preparation method thereof

Technical field

The present invention relates to metal ceramic coating material technical field, be specifically related to good metallic nickel ceramic coating of a kind of thermal shock resistance and preparation method thereof.

Background technology

Ceramic coating material is the stupalith being subject to extensive concern in recent years, and traditional stupalith has larger fragility, is unfavorable for the further processing of stupalith, also causes stupalith to show slightly not enough in the performance of numerous areas.Metal-ceramic coating is the obdurability that a kind of existing metal is good, has again the compound coating of the advantage such as high temperature resistant, wear-resistant, corrosion-resistant of pottery.Therefore, metal-ceramic coating obtains important application in many fields such as Aeronautics and Astronautics, such as bears at a high speed, that high-temperature fuel gas washes away etc. is complicated, the rocket engine components of bad working environments condition, can obtain effective protection by metallizing ceramic coating.There is many defects such as function singleness cost is high, toughness is little, intensity is low, coatability is poor in actual applications in the metal-ceramic coating prepared in prior art, limit use range and the Application Areas of metal-ceramic coating, be unfavorable for the realization of the target of industry energy conservation Green Development.

Summary of the invention

Object of the present invention is just to provide good metallic nickel ceramic coating of a kind of thermal shock resistance and preparation method thereof, to overcome the deficiencies in the prior art.

The object of the present invention is achieved like this:

The metallic nickel ceramic coating that a kind of thermal shock resistance is good, it is characterized in that, be made up of the raw material of following weight part: nano ceric oxide 14-18, nickel powder 37-48, wollastonite 23-31, zinc oxide 12-15, vanadium diboride 15-18, boron powder 17-21, glass fibre 5-8, rice bran wax 7-9, Rice pollard oil 6-8, tripoly phosphate sodium STPP 4.3-6.4, tetraethoxy 6-10, suitable quantity of water.

The preparation method of the metallic nickel ceramic coating that described a kind of thermal shock resistance is good, is characterized in that comprising the following steps:

(1) by nano ceric oxide in 605-720 DEG C of pyroprocessing 30-50 minute, rapidly through cooled with liquid nitrogen to room temperature, add tripoly phosphate sodium STPP and suitable quantity of water ultrasonic oscillation 20-40 minute spraying dry, add tetraethoxy stirring and evenly mixing, stir 5-8h under normal temperature, dry to constant weight;

(2) zinc oxide is joined in ball mill, spray into vaporific Rice pollard oil and mix thoroughly, add rice bran wax, at normal temperatures, carry out ball milling, mix, break up, obtained modified zinc oxide;

(3) by modified zinc oxide, vanadium diboride through 1550-1650 DEG C of high-temperature calcination 2-4 hour, cooling adds glass fibre and is ground to 200-300 order;

(4) by step (1), (3) reaction mass stirring and evenly mixing, add nickel powder, boron powder in 1100-1200 DEG C of high-temperature calcination 3-6 hour, be cooled to room temperature, put into ball mill and add other remaining component grinding 1-2 hour, add suitable quantity of water and be modulated into slip, be coated on dried sample surfaces, seasoning 24h, then 120 DEG C of dry 12h, fire 5min for last 1050 DEG C.

The present invention has following beneficial effect: the present invention selects metallic nickel to be metal matrix, adopt zinc oxide, the refractory compounds such as vanadium diboride are coated in base metal surface as the ceramic coating that ceramic phase is obtained, alloying element in matrix metal can spread to interface, occur with materials such as the NiO in coating: the surface reactions such as NiO+M → MO+Ni, active nickel atom and the matrix metal M of precipitate reduction form Ni-M metallic bond, thus improve the adherence of metal-ceramic coating and matrix metal, and rare earth nano cerium dioxide strengthens it to the atomic orbital interaction between binding molecule due to active high energy, promoter action is served to these reactions, adherence can be set up quickly, the boron powder added is combined the perviousness that can strengthen coating with nickel powder, preparation technology of the present invention is simple, prepared coating has thermal shock resistance excellence, the advantage such as corrosion-resistant.

Embodiment

The metallic nickel ceramic coating that described a kind of thermal shock resistance is good, it is characterized in that, be made up of the raw material of following weight part: nano ceric oxide 14, nickel powder 38, wollastonite 28, zinc oxide 14, vanadium diboride 16, boron powder 18, glass fibre 5, rice bran wax 9, Rice pollard oil 6, tripoly phosphate sodium STPP 4.5, tetraethoxy 6, suitable quantity of water.

Making method comprises the following steps:

(1) by nano ceric oxide in 605-720 DEG C of pyroprocessing 30-50 minute, rapidly through cooled with liquid nitrogen to room temperature, add tripoly phosphate sodium STPP and suitable quantity of water ultrasonic oscillation 20-40 minute spraying dry, add tetraethoxy stirring and evenly mixing, stir 5-8h under normal temperature, dry to constant weight;

(2) zinc oxide is joined in ball mill, spray into vaporific Rice pollard oil and mix thoroughly, add rice bran wax, at normal temperatures, carry out ball milling, mix, break up, obtained modified zinc oxide;

(3) by modified zinc oxide, vanadium diboride through 1550-1650 DEG C of high-temperature calcination 2-4 hour, cooling adds glass fibre and is ground to 200-300 order;

(4) by step (1), (3) reaction mass stirring and evenly mixing, add nickel powder, boron powder in 1100-1200 DEG C of high-temperature calcination 3-6 hour, be cooled to room temperature, put into ball mill and add other remaining component grinding 1-2 hour, add suitable quantity of water and be modulated into slip, be coated on dried sample surfaces, seasoning 24h, then 120 DEG C of dry 12h, fire 5min for last 1050 DEG C.

The technical parameter index of the metallic nickel ceramic coating using the present invention to produce is as follows:

(1) coating property is good, tack good, the strong difficult drop-off of the bonding force between coating and matrix metal;

(2) initial softening temperature improves 16.7 DEG C;

(3) coating is after tolerance 50 thermal shocks circulation, does not also have obviously peel off in the edges and corners of sample, shows excellent thermal shock resistance.

Claims (2)

1. the metallic nickel ceramic coating that a thermal shock resistance is good, it is characterized in that, be made up of the raw material of following weight part: nano ceric oxide 14-18, nickel powder 37-48, wollastonite 23-31, zinc oxide 12-15, vanadium diboride 15-18, boron powder 17-21, glass fibre 5-8, rice bran wax 7-9, Rice pollard oil 6-8, tripoly phosphate sodium STPP 4.3-6.4, tetraethoxy 6-10, suitable quantity of water.

2. the making method of the metallic nickel ceramic coating that a kind of thermal shock resistance according to claim 1 is good, is characterized in that comprising the following steps:

(1) by nano ceric oxide in 605-720 DEG C of pyroprocessing 30-50 minute, rapidly through cooled with liquid nitrogen to room temperature, add tripoly phosphate sodium STPP and suitable quantity of water ultrasonic oscillation 20-40 minute spraying dry, add tetraethoxy stirring and evenly mixing, stir 5-8h under normal temperature, dry to constant weight;

(2) zinc oxide is joined in ball mill, spray into vaporific Rice pollard oil and mix thoroughly, add rice bran wax, at normal temperatures, carry out ball milling, mix, break up, obtained modified zinc oxide;

(3) by modified zinc oxide, vanadium diboride through 1550-1650 DEG C of high-temperature calcination 2-4 hour, cooling adds glass fibre and is ground to 200-300 order;

(4) by step (1), (3) reaction mass stirring and evenly mixing, add nickel powder, boron powder in 1100-1200 DEG C of high-temperature calcination 3-6 hour, be cooled to room temperature, put into ball mill and add other remaining component grinding 1-2 hour, add suitable quantity of water and be modulated into slip, be coated on dried sample surfaces, seasoning 24h, then 120 DEG C of dry 12h, fire 5min for last 1050 DEG C.