CN109732090A - A kind of preparation method of the high-strength porous self-lubricating material of anti-scorching type - Google Patents
A kind of preparation method of the high-strength porous self-lubricating material of anti-scorching type Download PDFInfo
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Abstract
The present invention relates to a kind of preparation methods of high-strength porous self-lubricating material of anti-scorching type, belong to friction materials technology field.Technical solution of the present invention is compound using collosol and gel, by multi-component material in atomic level it is evenly dispersed in the material, form a network structure being made of small inorganic structure unit, network structure is gathered by generating colloidal sol, it is added to inside porous material, in use, generate oxide film, by oxide film to the further cladding on self-lubricating material surface, it is effectively improved the greasy property of self-lubricating material, simultaneously, porous metals and gel after gel filled are calcined the ceramics to be formed and are organically combined, skeleton is formed during sintering runs through entire material system, traditional self-lubricating material is effectively improved during the preparation process since material itself limitation causes to decompose the technical solution for leading to scaling loss under high temperature, further increase the resistance to scaling loss performance of high temperature of material.
Description
Technical field
The present invention relates to a kind of preparation methods of high-strength porous self-lubricating material of anti-scorching type, belong to friction materials technology neck
Domain.
Background technique
There will be friction when the components to contact with each other generate relative motion, to cause the abrasion of contact surface.Have
Data shows that abrasion is the main reason for causing 80% mechanical part to fail, and friction consumes the world energy sources of 1/3-1/2.It improves
Lubricity is to reduce friction, reduce abrasion, improves components service life and reduces the effective way of energy consumption.With science
The development of technology, the fields such as automobile, electric mechanical, petrochemical industry, electric power, aerospace require mechanical part in high temperature, high speed, Gao Zhen
It works under the conditions of the special operation conditions such as sky.The greasy property, service life and the security performance that improve important spare part are proposed more
High requirement, common material are no longer satisfied the requirement of rigidity, intensity, fatigue resistance etc..In order to solve problem above,
With tribology principle, studying novel self-lubricating composite material becomes the hot spot of tribological field.
Solid self lubricant material refers to a kind of engineering material that lubricant is served as using the solid matter with mild method
Material.During preparing high-temp self-lubricating metal-ceramic composite material, by sulfide, fluoride, oxide, graphite and soft gold
The solid lubricants such as category are uniformly mixed using ball mill with matrix powder as constituent element, after being sintered by powder metallurgic method,
Solid lubricant is precipitated by the frictional heat generated in friction process to surface, realizes its self-lubricating property.But it is burnt in high temperature
During knot, fraction solids lubricant is easily burnt, lead to the reduction of greasy property, and solid lubricant is directly added into meeting
The continuity for destroying metal-ceramic matrix material, causes the reduction of intensity and toughness.
With going deep into for the research to solid self lubricant material, will be used wider and wider for solid self lubricant material is general.
Solid self lubricant material different liquids lubricant, it is wide to the adaptation range of temperature, it can be used for various extreme temperature occasions, such as use
Graphite etc. has stable high-temperature performance, and can be used as high temperature self-lubricating composite, and such as squeezing, the heat such as drawing do die surface lubrication
Agent also expects the coefficient of friction seen to reduce mold and part, improves demoulding efficiency, improve die life.Utilize lead film
The characteristic of no black brittleness transformation can be used as close to the self-lubricating material under extremely cold environment, as deep space exploration satellite
The self-lubricating surface film of bearing in mechanical device.Particular job environment such as solid self lubricant material is further adapted to vacuum, good fortune is penetrated,
Such as utilize the composite lubricating film of curing silver combined magnetic-controlled sputter film preparation sky day equipment transmission device.Utilize macromolecule self-lubricating
Corrosion resistant candle performance it is good, as the self-lubricating material under corrosive environment, such as polytetrafluoroethylene self-lubricating film.
The preparation method of high-temp self-lubricating metal-ceramic composite material mainly has: powder metallurgic method, smelting process, fabricated in situ
Method etc..1, powder metallurgic method；It is that the metal phase of certain component proportion and ceramic phase basis material are put into vacuum sintering funace
In, according to certain sintering process curve, prepare high temperature self-lubricating composite material.The preparation method requires metal phase and ceramics
It can mutually be soaked between phase, and want strict control heating rate.The Ni/ZrO2 cermet prepared using powder metallurgic method
Composite material, the material can be used as galvanic anode use；The Fe-Mo- (MoS2/PbO) prepared using this method sintering is compound
Material, when temperature is higher than 600 DEG C, in friction surface formation lubricating film, (main component has PbMoO to the material4、Pb、Fe2O3
Deng), there is good self-lubricating property；The sintered body that ordered micro-cellular structure is prepared by powder metallurgy sintered method, then soaks
Solid lubricant is seeped, to prepare high temperature sweating self-lubricating composite；By to matrix composition, Content of Pore-forming Agents and sintering
Technological parameter etc. is analyzed, its influence to sintered body microcellular structure and mechanical performance is understood, so that micropore is prepared in sintering
Through self-lubricating composite.2, smelting process；Compared with powder metallurgic method, the technique of smelting process is simpler, can prepare shape
The component of shape complexity, and the mechanical property for preparing material is preferable.3, in-situ synthesis；The basic principle of in-situ synthesis is root
It is chemically reacted according to different elements by certain condition, to generate one or more of reinforced phase particles, reaches improvement
The purpose of composite property.
Porous material is by being mutually communicated or closed hole is formed by the internal network body being mutually communicated.According to more
The difference of Porous materials microcellular structure, can be divided into three kinds: (1) bi-dimensional cellular material；(2) three-dimensional open pores foamed material；(3) three
Tie up closed-cell foam material.Porous material has the spies such as relative density is lower, permeance property is preferable, specific surface area is larger, high temperature resistant
Point is widely applied in the industry fields such as aerospace, machinery, building, medicine.The manufacturing process of porous material is simpler,
By adjusting technological parameter in preparation process, the material with different performance can be obtained.It can be by porous material according to material
It is divided into two class of metal material and nonmetallic materials.The matrix of porous metal material is made of metallic framework, and wherein includes
A large amount of pore structure, porous non-metallic material are mainly porous ceramics and foamed plastics etc..
The features such as copper alloy is a kind of common solid self lubricant material, he has bearing capacity strong, and fatigue strength is high.
Industrial traditional preparation process has cast to make method and powder metallurgic method.In casting, due to Cu alloy material
Density variation is larger, is easy to produce gravity segregation phenomenon.Powder metallurgic method preparation alloy sample often exist impact flexibility compared with
The feature of difference.Most importantly high temperature sintering makes solid lubricant generation oxidation or scaling loss lose its partial lubrication, causes multiple
The precipitation of condensation material contact surface lubricant in friction process is reduced, and reduces the tribological property of composite material, and due to
The operational characteristic of high temperature sintering is difficult control lubrication and is mutually distributed in the base, be easy to cause being unevenly distributed for lubrication phase, causes
The continuity of basis material is destroyed to influence the intensity and toughness of composite material, so preparing one kind has excellent properties,
And the porous copper alloy self-lubricating material of anti-ablation seems especially urgent.
Summary of the invention
The technical problems to be solved by the invention: make solid lubricant that oxidation or scaling loss funeral occur for existing high temperature sintering
Its partial lubrication is lost, causes the precipitation of composite material contact surface lubricant in friction process to reduce, reduces composite wood
The tribological property of material, and be mutually distributed in the base since the operational characteristic of high temperature sintering is difficult control lubrication, it be easy to cause profit
Sliding phase is unevenly distributed, and causes the continuity of basis material to be destroyed to influence the intensity of composite material and asking for toughness
Topic, provides a kind of preparation method of high-strength porous self-lubricating material of anti-scorching type.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
(1) ionized water, sucrose, eight hydration zirconium oxychlorides, boric acid and citric acid is removed to be stirred to be placed at 45~55 DEG C and protect
Temperature reaction 1~2h, obtain matrix liquid and polyglycol solution be added in matrix liquid, be stirred mixed liquor is placed in room temperature
Under, to citric acid solution is added dropwise in mixed liquor, control citric acid solution drop rate is 2~3mL/min, after being added dropwise to complete,
25~30min is stood, matrix sol solutions is obtained and sucrose is added in matrix sol solutions, is stirred and with mass fraction 5%
Ammonium hydroxide adjusts pH to 10.0, stands 6~8h, obtains sol-gel modified liquid；Ionized water, ammonium hydroxide, CTAB and urea is removed again to mix and drip
Add aluminum nitrate solution, is stirred to obtain complex sol liquid；1:1 by volume stirs plural gel liquid and sol-gel modified liquid mixed
Merging is placed in still aging 6~8h at room temperature, obtains mixed sols liquid；
(2) 1:5~1:8 in mass ratio takes mixed sols liquid and grinding copper powder to be stirred to obtain mixed serum, mixed serum is poured
Note is into mold, after repressed processing, after demoulding drying, calcining, is cooled to room temperature with furnace standing, washs, dries, is crushed, grinds
Mill can be prepared into the high-strength porous self-lubricating material of anti-scorching type.
Ratio between the deionized water, sucrose, boric acid, eight hydration zirconium oxychlorides, sucrose and citric acid is preferable
According to parts by weight, to weigh 45~50 parts of deionized waters, 10~15 parts of 10% polyglycol solutions of mass fraction, 3~5 respectively
Part citric acid, 6~8 part of eight hydration zirconium oxychloride, 1~2 part of boric acid and 1~2 portion of sucrose.
Ratio between the deionized water, ammonium hydroxide, CTAB and urea is preferably 45~50 parts of deionized waters, 3~5
Part ammonium hydroxide, 1~2 part of CTAB and 0.5~1.0 part of urea.
The aluminum nitrate solution drop rate is 1~2mL/min.
The mixed sols liquid and grinding copper powder mixed proportion is preferably 1:5 in mass ratio.
The mixed serum is cast for after being completed uniaxial pressure green compact pedestal and die cavity, and slurries are filled to mould
In chamber, it is put into gasket and with pressure head.
The compression process be whole set of die is placed in hydraulic press, unidirectional green compact and control pressing pressure be 25~
30MPa suppresses 15~20min.
The demoulding is dry to be placed in air dry oven for that will demould blank, and control drying temperature temperature is 155~160
DEG C, after 2~3h of heat preservation and dryness, obtain dry blank.
The calcining is that will dry blank to be placed in box atmosphere furnace, leads to argon gas and excludes air, control argon gas is passed through speed
Rate is 25~30mL/min, after excluding air, is warming up to 300~350 DEG C by 10 DEG C/min rate, heat preservation calcines 25~
After 30min, then by 5 DEG C/min it is warming up to 1000~1100 DEG C, 1~2h of heat preservation calcining.
The washing is at room temperature, to be rinsed 3~5 times with deionized water.
The present invention is compared with other methods, and advantageous effects are:
(1) technical solution of the present invention is compound using collosol and gel, and multi-component material is dispersed in material in atomic level
In material, a network structure being made of small inorganic structure unit is formed, by the way that there are also aluminum nitrates etc. by zirconium oxychloride and boric acid
Reaction is respectively hydrolyzed in material in a solvent, and product molecule generates nanoscale nucleus particle and generates colloidal sol, in specified conditions
Lower ageing forms wet gel, and colloidal particle is gradually gathered into network structure in ageing process, and whole system loses flowability simultaneously
There is thixotropy, then to wet gel, by flowing forming between gel and mutually pass network, be effectively improved the binding performance of material,
Keep its complex boronisation zirconium gel alumina gel-forming compound and be added to inside porous material in cohesive process, was being used
Cheng Zhong, self-lubricating material, which reaches certain temperature, will occur friction chemical reaction, generate the conjugations such as TiO2 and boron oxide compared with
High oxide film is effectively improved the profit of self-lubricating material by oxide film to the further cladding on self-lubricating material surface
Slip energy, meanwhile, it is gel filled after porous metals and gel calcine to be formed ceramics organically combine, shape during sintering
Run through entire material system at skeleton, while maintaining the mechanical property of material, also improves material self-lubricating property, effectively
Improve traditional self-lubricating material during the preparation process since material itself limitation causes to decompose the technical side for leading to scaling loss under high temperature
Case further increases the resistance to scaling loss performance of high temperature of material；
(2) technical solution of the present invention using colloidal sol it is compound and with metal material organic composite, due to eutectic directional solidification technique system
Standby porous fine copper is porous preform material, and the ceramic particle particle of gel preparation is as self-lubricating material, by under normal pressure
Liquid sol method of impregnation makes in preparation process gel is composite filled to enter in porous preform hole, makes after warm, solidification
Standby self-lubricating composite summarizes it in calcination process and reacts, together due to mutually passing the configuration of network between plural gel
When production ceramic material during form gas filling, the porosity of portion's formation rule porous preform in metal materials,
What the hole of directional profile had has anisotropy, such as the permeance property that has had in hole prolonging direction and high strong
Degree, in this way can retention discipline Porous Cu part of properties and give full play to the self-lubricating property of ceramic composite, make
Copper and ceramic particle have complementary advantages, simultaneously because self-lubrication ceramic particle and metal are mixed calcinings, make it in filling and
Composite square face has excellent binding characteristic, and can make it in use has excellent bond strength, this can not only change
The bond strength of kind material, while preventing material from penetrating through the phenomenon that causing self-lubricating material to fall off due to metal hole.
Specific embodiment
According to parts by weight, it is molten that 45~50 parts of deionized waters, 10~15 parts of 10% polyethylene glycol of mass fraction are weighed respectively
Liquid, 3~5 parts of citric acids, 6~8 part of eight hydration zirconium oxychloride, 1~2 part of boric acid and 1~2 portion of sucrose, take above-mentioned weighing go from
Sub- water, sucrose, eight hydration zirconium oxychlorides, boric acid and citric acid are stirred and are placed in 1~2h of insulation reaction at 45~55 DEG C, obtain
Polyglycol solution is simultaneously added in matrix liquid by matrix liquid, be stirred mixed liquor juxtaposition at room temperature, in mixed liquor
Citric acid solution is added dropwise, control citric acid solution drop rate is 2~3mL/min, after being added dropwise to complete, 25~30min is stood,
Matrix sol solutions and sucrose is added in matrix sol solutions, be stirred and with 5% ammonium hydroxide of mass fraction adjusting pH to
10.0,6~8h is stood, sol-gel modified liquid is obtained；According to parts by weight, 45~50 parts of deionized waters, 3~5 parts of quality are weighed respectively
5% ammonium hydroxide of score, 1~2 part of CTAB and 0.5~1.0 part of urea are placed in a beaker, and are stirred and are added dropwise and the quality such as urea
0.05mol/L aluminum nitrate solution, control drop rate are that 1~2mL/min is stirred to obtain complex sol after being added dropwise to complete
Liquid；Plural gel liquid and sol-gel modified liquid are stirred juxtaposition still aging 6~8h at room temperature, obtained mixed by 1:1 by volume
Close sol solutions；Taking purity is that 99.8% copper powder is placed in grinding device, then 1~2h is ground at 250~300r/min, is obtained
Abrasive grains simultaneously cross 200 meshes, and must be sieved particle and 1:5~1:8 in mass ratio, and mixed sols liquid and grinding copper powder stirring is mixed
Mixed serum is closed to obtain, mixed serum is poured into mold, after uniaxial pressure green compact pedestal and die cavity are completed, by slurries
Filling is put into gasket and with pressure head, whole set of die is placed in hydraulic press into die cavity, and unidirectional green compact simultaneously controls pressing pressure and is
After 25~30MPa, 15~20min to be pressed, removes pedestal and taken out blank with hydraulic press, obtain demoulding blank；Base will be demoulded
Material is placed in air dry oven, and control drying temperature temperature is 155~160 DEG C, and after 2~3h of heat preservation and dryness, dry blank is set
In box atmosphere furnace, leads to argon gas and exclude air, it is that 25~30mL/min is pressed after excluding air that control argon gas, which is passed through rate,
10 DEG C/min rate is warming up to 300~350 DEG C, after 25~30min is calcined in heat preservation, then is warming up to 1000~1100 by 5 DEG C/min
DEG C, it after 1~2h of heat preservation calcining, is cooled to room temperature with furnace standing, is rinsed 3~5 times with deionized water, dry 6 at 45~50 DEG C
After~8h, crushing grinding can be prepared into the high-strength porous self-lubricating material of anti-scorching type.
According to parts by weight, it is molten that 45~50 parts of deionized waters, 10~15 parts of 10% polyethylene glycol of mass fraction are weighed respectively
Liquid, 3~5 parts of citric acids, 6~8 part of eight hydration zirconium oxychloride, 1~2 part of boric acid and 1~2 portion of sucrose, take above-mentioned weighing go from
Sub- water, sucrose, eight hydration zirconium oxychlorides, boric acid and citric acid are stirred and are placed in 1~2h of insulation reaction at 45~55 DEG C, obtain
Polyglycol solution is simultaneously added in matrix liquid by matrix liquid, be stirred mixed liquor juxtaposition at room temperature, in mixed liquor
Citric acid solution is added dropwise, control citric acid solution drop rate is 2~3mL/min, after being added dropwise to complete, 25~30min is stood,
Matrix sol solutions and sucrose is added in matrix sol solutions, be stirred and with 5% ammonium hydroxide of mass fraction adjusting pH to
10.0,6~8h is stood, sol-gel modified liquid is obtained；According to parts by weight, 45~50 parts of deionized waters, 3~5 parts of quality are weighed respectively
5% ammonium hydroxide of score, 1~2 part of CTAB and 0.5~1.0 part of urea are placed in a beaker, and are stirred and are added dropwise and the quality such as urea
0.05mol/L aluminum nitrate solution, control drop rate are that 1~2mL/min is stirred to obtain complex sol after being added dropwise to complete
Liquid；Plural gel liquid and sol-gel modified liquid are stirred juxtaposition still aging 6~8h at room temperature, obtained mixed by 1:1 by volume
Close sol solutions；Taking purity is that 99.8% copper powder is placed in grinding device, then 1~2h is ground at 250~300r/min, is obtained
Abrasive grains simultaneously cross 200 meshes, and must be sieved particle and 1:5~1:8 in mass ratio, and mixed sols liquid and grinding copper powder stirring is mixed
Mixed serum is closed to obtain, mixed serum is poured into mold, after uniaxial pressure green compact pedestal and die cavity are completed, by slurries
Filling is put into gasket and with pressure head, whole set of die is placed in hydraulic press into die cavity, and unidirectional green compact simultaneously controls pressing pressure and is
After 25~30MPa, 15~20min to be pressed, removes pedestal and taken out blank with hydraulic press, obtain demoulding blank；Base will be demoulded
Material is placed in air dry oven, and control drying temperature temperature is 155~160 DEG C, and after 2~3h of heat preservation and dryness, dry blank is set
In box atmosphere furnace, leads to argon gas and exclude air, it is that 25~30mL/min is pressed after excluding air that control argon gas, which is passed through rate,
10 DEG C/min rate is warming up to 300~350 DEG C, after 25~30min is calcined in heat preservation, then is warming up to 1000~1100 by 5 DEG C/min
DEG C, it after 1~2h of heat preservation calcining, is cooled to room temperature with furnace standing, is rinsed 3~5 times with deionized water, dry 6 at 45~50 DEG C
After~8h, crushing grinding can be prepared into the high-strength porous self-lubricating material of anti-scorching type.
According to parts by weight, it is molten that 45~50 parts of deionized waters, 10~15 parts of 10% polyethylene glycol of mass fraction are weighed respectively
Liquid, 3~5 parts of citric acids, 6~8 part of eight hydration zirconium oxychloride, 1~2 part of boric acid and 1~2 portion of sucrose, take above-mentioned weighing go from
Sub- water, sucrose, eight hydration zirconium oxychlorides, boric acid and citric acid are stirred and are placed in 1~2h of insulation reaction at 45~55 DEG C, obtain
Polyglycol solution is simultaneously added in matrix liquid by matrix liquid, be stirred mixed liquor juxtaposition at room temperature, in mixed liquor
Citric acid solution is added dropwise, control citric acid solution drop rate is 2~3mL/min, after being added dropwise to complete, 25~30min is stood,
Matrix sol solutions and sucrose is added in matrix sol solutions, be stirred and with 5% ammonium hydroxide of mass fraction adjusting pH to
10.0,6~8h is stood, sol-gel modified liquid is obtained；According to parts by weight, 45~50 parts of deionized waters, 3~5 parts of quality are weighed respectively
5% ammonium hydroxide of score, 1~2 part of CTAB and 0.5~1.0 part of urea are placed in a beaker, and are stirred and are added dropwise and the quality such as urea
0.05mol/L aluminum nitrate solution, control drop rate are that 1~2mL/min is stirred to obtain complex sol after being added dropwise to complete
Liquid；Plural gel liquid and sol-gel modified liquid are stirred juxtaposition still aging 6~8h at room temperature, obtained mixed by 1:1 by volume
Close sol solutions；Taking purity is that 99.8% copper powder is placed in grinding device, then 1~2h is ground at 250~300r/min, is obtained
Abrasive grains simultaneously cross 200 meshes, and must be sieved particle and 1:5~1:8 in mass ratio, and mixed sols liquid and grinding copper powder stirring is mixed
Mixed serum is closed to obtain, mixed serum is poured into mold, after uniaxial pressure green compact pedestal and die cavity are completed, by slurries
Filling is put into gasket and with pressure head, whole set of die is placed in hydraulic press into die cavity, and unidirectional green compact simultaneously controls pressing pressure and is
After 25~30MPa, 15~20min to be pressed, removes pedestal and taken out blank with hydraulic press, obtain demoulding blank；Base will be demoulded
Material is placed in air dry oven, and control drying temperature temperature is 155~160 DEG C, and after 2~3h of heat preservation and dryness, dry blank is set
In box atmosphere furnace, leads to argon gas and exclude air, it is that 25~30mL/min is pressed after excluding air that control argon gas, which is passed through rate,
10 DEG C/min rate is warming up to 300~350 DEG C, after 25~30min is calcined in heat preservation, then is warming up to 1000~1100 by 5 DEG C/min
DEG C, it after 1~2h of heat preservation calcining, is cooled to room temperature with furnace standing, is rinsed 3~5 times with deionized water, dry 6 at 45~50 DEG C
After~8h, crushing grinding can be prepared into the high-strength porous self-lubricating material of anti-scorching type.
According to parts by weight, it is molten that 45~50 parts of deionized waters, 10~15 parts of 10% polyethylene glycol of mass fraction are weighed respectively
Liquid, 3~5 parts of citric acids, 6~8 part of eight hydration zirconium oxychloride, 1~2 part of boric acid and 1~2 portion of sucrose, take above-mentioned weighing go from
Sub- water, sucrose, eight hydration zirconium oxychlorides, boric acid and citric acid are stirred and are placed in 1~2h of insulation reaction at 45~55 DEG C, obtain
Polyglycol solution is simultaneously added in matrix liquid by matrix liquid, be stirred mixed liquor juxtaposition at room temperature, in mixed liquor
Citric acid solution is added dropwise, control citric acid solution drop rate is 2~3mL/min, after being added dropwise to complete, 25~30min is stood,
Matrix sol solutions and sucrose is added in matrix sol solutions, be stirred and with 5% ammonium hydroxide of mass fraction adjusting pH to
10.0,6~8h is stood, sol-gel modified liquid is obtained；According to parts by weight, 45~50 parts of deionized waters, 3~5 parts of quality are weighed respectively
5% ammonium hydroxide of score, 1~2 part of CTAB and 0.5~1.0 part of urea are placed in a beaker, and are stirred and are added dropwise and the quality such as urea
0.05mol/L aluminum nitrate solution, control drop rate are that 1~2mL/min is stirred to obtain complex sol after being added dropwise to complete
Liquid；Plural gel liquid and sol-gel modified liquid are stirred juxtaposition still aging 6~8h at room temperature, obtained mixed by 1:1 by volume
Close sol solutions；Taking purity is that 99.8% copper powder is placed in grinding device, then 1~2h is ground at 250~300r/min, is obtained
Abrasive grains simultaneously cross 200 meshes, and must be sieved particle and 1:5~1:8 in mass ratio, and mixed sols liquid and grinding copper powder stirring is mixed
Mixed serum is closed to obtain, mixed serum is poured into mold, after uniaxial pressure green compact pedestal and die cavity are completed, by slurries
Filling is put into gasket and with pressure head, whole set of die is placed in hydraulic press into die cavity, and unidirectional green compact simultaneously controls pressing pressure and is
After 25~30MPa, 15~20min to be pressed, removes pedestal and taken out blank with hydraulic press, obtain demoulding blank；Base will be demoulded
Material is placed in air dry oven, and control drying temperature temperature is 155~160 DEG C, and after 2~3h of heat preservation and dryness, dry blank is set
In box atmosphere furnace, leads to argon gas and exclude air, it is that 25~30mL/min is pressed after excluding air that control argon gas, which is passed through rate,
10 DEG C/min rate is warming up to 300~350 DEG C, after 25~30min is calcined in heat preservation, then is warming up to 1000~1100 by 5 DEG C/min
DEG C, it after 1~2h of heat preservation calcining, is cooled to room temperature with furnace standing, is rinsed 3~5 times with deionized water, dry 6 at 45~50 DEG C
After~8h, crushing grinding can be prepared into the high-strength porous self-lubricating material of anti-scorching type.
Self-lubricating material prepared by technical solution of the present invention is tested for the property, it is full-automatic by using Tukon2500
The hardness that microhardness testers measure wearing layer is distributed, loaded load 4.9N, load time 15s, and between guarantee adjacent indentations
Distance be more than or equal to cornerwise 3 times of impression, there is work-hardening effect to avoid wearing layer.Utilize CBD-500 testing machine
Shock resistance experiment test is carried out to wearing layer.Frictional experiment uses Tsinghua University SRV-4 high temperature friction and wear testing machine, experiment fortune
Dynamic form be it is reciprocating, contact form is face contact,
Frequency is 15Hz, and experimental temperature is 180 DEG C, time 30min, and opposite grinding auxiliary material uses 40Cr, via nitride processing, hardness
For 500HV, surface roughness is 1.6 μm.Comparative study load (435,870N),
Influence of the lubricating status (oil lubrication, dry friction) to two kinds of wearing layer friction and wear behaviors, 1 performance characterization contrast table of table
| Detection project | Example 1 | Example 2 | Example 3 |
| Wear-resisting layer porosity/% | 25.68 | 26.32 | 26.41 |
| Shock resistance | Have no cracking | Have no cracking | Have no cracking |
| Bending strength/MPa | 168.32 | 169.21 | 170.58 |
| Brinell hardness/MPa | 753.6 | 758.1 | 759.6 |
| Relative density/% | 98.21 | 98.13 | 98.08 |
| Resistivity/10-8 Ω·m | 5.12 | 5.18 | 5.23 |
As shown in Table 1, self-lubricating material prepared by the present invention has excellent mechanical strength and performance, explanation after calcining preparation
It is with excellent ablation resistance.
Claims (10)
1. a kind of preparation method of the high-strength porous self-lubricating material of anti-scorching type, it is characterised in that specific preparation step are as follows:
(1) ionized water, sucrose, eight hydration zirconium oxychlorides, boric acid and citric acid is removed to be stirred to be placed at 45~55 DEG C and protect
Temperature reaction 1~2h, obtain matrix liquid and polyglycol solution be added in matrix liquid, be stirred mixed liquor is placed in room temperature
Under, to citric acid solution is added dropwise in mixed liquor, control citric acid solution drop rate is 2~3mL/min, after being added dropwise to complete,
25~30min is stood, matrix sol solutions is obtained and sucrose is added in matrix sol solutions, is stirred and with mass fraction 5%
Ammonium hydroxide adjusts pH to 10.0, stands 6~8h, obtains sol-gel modified liquid；Ionized water, ammonium hydroxide, CTAB and urea is removed again to mix and drip
Add aluminum nitrate solution, is stirred to obtain complex sol liquid；1:1 by volume stirs plural gel liquid and sol-gel modified liquid mixed
Merging is placed in still aging 6~8h at room temperature, obtains mixed sols liquid；
(2) 1:5~1:8 in mass ratio takes mixed sols liquid and grinding copper powder to be stirred to obtain mixed serum, mixed serum is poured
Note is into mold, after repressed processing, after demoulding drying, calcining, is cooled to room temperature with furnace standing, washs, dries, is crushed, grinds
Mill can be prepared into the high-strength porous self-lubricating material of anti-scorching type.
2. according to right want 1 described in a kind of preparation method of the high-strength porous self-lubricating material of anti-scorching type, it is characterised in that: institute
The ratio between deionized water, sucrose, boric acid, eight hydration zirconium oxychlorides, sucrose and citric acid stated preferably is by weight
Number meter, weighs 45~50 parts of deionized waters, 10~15 parts of 10% polyglycol solutions of mass fraction, 3~5 parts of citric acids, 6 respectively
~8 part of eight hydration zirconium oxychloride, 1~2 part of boric acid and 1~2 portion of sucrose.
3. according to right want 1 described in a kind of preparation method of the high-strength porous self-lubricating material of anti-scorching type, it is characterised in that: institute
The ratio between deionized water, ammonium hydroxide, CTAB and urea stated preferably be 45~50 parts of deionized waters, 3~5 parts of ammonium hydroxide, 1~
2 parts of CTAB and 0.5~1.0 part of urea.
4. according to right want 1 described in a kind of preparation method of the high-strength porous self-lubricating material of anti-scorching type, it is characterised in that: institute
The aluminum nitrate solution drop rate stated is 1~2mL/min.
5. according to right want 1 described in a kind of preparation method of the high-strength porous self-lubricating material of anti-scorching type, it is characterised in that: institute
The mixed sols liquid and grinding copper powder mixed proportion stated are preferably 1:5 in mass ratio.
6. according to right want 1 described in a kind of preparation method of the high-strength porous self-lubricating material of anti-scorching type, it is characterised in that: institute
The mixed serum stated is cast for after being completed uniaxial pressure green compact pedestal and die cavity, and slurries are filled into die cavity, are put into
Gasket and with pressure head.
7. according to right want 1 described in a kind of preparation method of the high-strength porous self-lubricating material of anti-scorching type, it is characterised in that: institute
The compression process stated is that whole set of die is placed in hydraulic press, and unidirectional green compact simultaneously controls pressing pressure as 25~30MPa, suppresses 15
~20min.
8. according to right want 1 described in a kind of preparation method of the high-strength porous self-lubricating material of anti-scorching type, it is characterised in that: institute
The demoulding stated is dry to be placed in air dry oven for that will demould blank, and control drying temperature temperature is 155~160 DEG C, and heat preservation is dry
After dry 2~3h, dry blank is obtained.
9. according to right want 1 described in a kind of preparation method of the high-strength porous self-lubricating material of anti-scorching type, it is characterised in that: institute
The calcining stated is that will dry blank and be placed in box atmosphere furnace, leads to argon gas and excludes air, control argon gas be passed through rate be 25~
30mL/min is warming up to 300~350 DEG C by 10 DEG C/min rate, after 25~30min is calcined in heat preservation, then presses after excluding air
5 DEG C/min is warming up to 1000~1100 DEG C, 1~2h of heat preservation calcining.
10. according to right want 1 described in a kind of preparation method of the high-strength porous self-lubricating material of anti-scorching type, it is characterised in that:
The washing is at room temperature, to be rinsed 3~5 times with deionized water.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111842853A (en) * | 2020-07-30 | 2020-10-30 | 南昌工程学院 | Porous metal ceramic matrix composite material for preparing self-lubricating bearing and preparation method thereof |
| CN114406274A (en) * | 2021-12-30 | 2022-04-29 | 英特派铂业股份有限公司 | Method for preparing nano reinforced phase dispersed reinforced platinum |
| CN115418522A (en) * | 2022-04-27 | 2022-12-02 | 合肥工业大学 | Porosity-controllable copper-based wide-temperature-range liquid-solid synergistic self-lubricating composite material and preparation method thereof |
-
2019
- 2019-01-22 CN CN201910059832.3A patent/CN109732090A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111842853A (en) * | 2020-07-30 | 2020-10-30 | 南昌工程学院 | Porous metal ceramic matrix composite material for preparing self-lubricating bearing and preparation method thereof |
| CN114406274A (en) * | 2021-12-30 | 2022-04-29 | 英特派铂业股份有限公司 | Method for preparing nano reinforced phase dispersed reinforced platinum |
| CN114406274B (en) * | 2021-12-30 | 2023-07-14 | 英特派铂业股份有限公司 | Method for preparing nano reinforced phase dispersed reinforced platinum |
| CN115418522A (en) * | 2022-04-27 | 2022-12-02 | 合肥工业大学 | Porosity-controllable copper-based wide-temperature-range liquid-solid synergistic self-lubricating composite material and preparation method thereof |
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