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A kind of preparation method of surface modified ZTA ceramic particles reinforced steel matrix composite material

A technology of ceramic particles and composite materials, applied in metal material coating process, liquid chemical plating, coating and other directions, can solve the problems of composite layer peeling along the joint surface, high brittleness, premature fracture or peeling, etc., to improve the economy. Benefits and social benefits, simple process operation, and the effect of improving mechanical properties

Active Publication Date: 2020-03-17
XI AN JIAOTONG UNIV +1
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Problems solved by technology

[0002] The composite layer of the traditional surface composite material is distributed on the surface of the component in the form of an entire layer. This kind of surface partial composite material still has deficiencies in the service process: if the composite layer contains a large amount of ceramic particles, the hardness is extremely high, which can significantly improve the wear resistance of the composite material. The higher the content of ceramic particles, the greater the brittleness, which may break or peel off in advance during service, which seriously affects the popularization and application of this type of composite material; The shrinkage of the liquid metal during the infiltration process and the mismatch between the physical properties of the reinforcing phase and the base metal material will generate a large stress, which will easily cause the peeling of the composite layer along the joint surface under high impact loads, and the composite layer cannot be fully utilized. High wear resistance

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  • A kind of preparation method of surface modified ZTA ceramic particles reinforced steel matrix composite material

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preparation example Construction

[0027] A method for preparing a surface-modified ZTA ceramic particle reinforced iron-based composite material of the present invention comprises the following steps:

[0028] S1. Soak ZTA ceramic particles in acetone for 10 to 30 minutes, followed by ultrasonic cleaning for 5 to 15 minutes, followed by deionized water cleaning and alcohol rinsing, and drying in an electric constant temperature blast drying oven at a temperature of 105°C , the time is 6h, standby;

[0029] S2. Use a stannous chloride solution with a concentration of 5 to 15g / L to sensitize the ZTA ceramic particles for 10 to 30 minutes, and perform an activation treatment with a palladium chloride solution with a concentration of 0.3 to 0.6g / L for 10 to 30 minutes, and then adsorb on the surface Pd 2+ The reducing agent H in the sodium hypophosphite solution with a concentration of 5-15g / L 2 PO 2 - In situ reduction to metallic Pd;

[0030] S3. Prepare a stabilizer with methanol, sodium sulfite and ferrou...

Embodiment 1

[0041] 1) First, soak the ZTA particles in acetone for 10 minutes, ultrasonically clean them for 5 minutes, then wash them with deionized water, rinse them with alcohol, and dry them;

[0042] 2) Next, sensitize the ZTA ceramic particles with 5g / L stannous chloride solution for 10min, activate with 0.3g / L palladium chloride solution for 10min, and the Pd adsorbed on the surface 2+ Reducing agent H in 5g / L sodium hypophosphite solution 2 PO 2 - In situ reduction to metallic Pd;

[0043] 3) Prepare a stabilizer with methanol, sodium sulfite and ferrous sulfate in proportion, then dissolve 70g / L chromium sulfate, dissolve 35g / L boric acid in deionized water at 50°C, and magnetically stir until completely dissolved, then mix the chromium sulfate solution with boric acid Stir the solution for 1.5h; introduce complexing agent - oxalic acid 0.2mol / L, continue to stir for 1h to make it completely complexed, add 0.1mol / L of citric acid, continue stirring for 1h, add deionized water ...

Embodiment 2

[0048] 1) First, soak ZTA particles in acetone for 20 minutes, ultrasonically clean for 10 minutes, wash with deionized water, rinse with alcohol, and dry;

[0049] 2) Next, carry out sensitization treatment 20min to ZTA ceramic particle with the stannous chloride solution of 10g / L, 0.4g / L palladium chloride solution activation treatment 20min, the H in the sodium hypophosphite solution of 10g / L 2 PO 2 - In situ reduction of Pd 2+ ;

[0050] 3) Prepare a stabilizer with methanol, sodium sulfite and ferrous sulfate in proportion, then dissolve 95g / L chromium sulfate, dissolve 50g / L boric acid in deionized water at 65°C, stir until completely dissolved, and mix the chromium sulfate solution with boric acid Stir the solution for 1.5h; introduce complexing agent - oxalic acid 0.6mol / L, continue stirring for 2h to make it complex completely, add 0.5mol / L citric acid, continue stirring for 1.5h, add deionized water to 1L, adjust the pH value To 2.5, ZTA ceramic particles are pla...

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Abstract

The invention discloses a preparation method of a surface-modified ZTA ceramic particle reinforced steel based composite material. The preparation method comprises the steps that sensitization and activation treatment is conducted on ZTA particles, surface plating is conducted, the ZTA particles are plated with nickel and chromium to achieve surface metallization by controlling the components andthe proportion of a plating solution, the ZTA particles plated with Cr-Ni layers, Ni-Cr alloy powder and Al powder are put into a graphite mold to be made into a preform which is of a honeycomb structure through vacuum sintering, molten metal is poured by adopting a casting infiltration method, and after cooling is conducted, the reinforced steel based composite material is obtained. According tothe preparation method of the surface-modified ZTA ceramic particle reinforced steel based composite material, the ZTA particles are plated with nickel and chromium to achieve surface metallization bycontrolling the components and the proportion of the plating solution, the wet problem with a metal matrix is solved, and then the mechanical property of the composite material is improved; and meanwhile, the technology is easy to operate, the cost is reduced to a large extent, no toxicity or pollution is generated, the great potential on increasing the economic benefit and the social benefit isachieved, and the good prospect of being applied to the harsh abrasive wear condition is achieved.

Description

technical field [0001] The invention belongs to the technical field of metal-based composite material preparation, and in particular relates to a method for preparing a surface-modified ZTA ceramic particle-reinforced steel-based composite material. Background technique [0002] The composite layer of the traditional surface composite material is distributed on the surface of the component in the form of an entire layer. This kind of surface partial composite material still has deficiencies in the service process: if the composite layer contains a large amount of ceramic particles, the hardness is extremely high, which can significantly improve the wear resistance of the composite material. The higher the content of ceramic particles, the greater the brittleness, which may break or peel off early in the service process, seriously affecting the popularization and application of this type of composite material; During the infiltration process, the shrinkage of the liquid metal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/18C23C18/36C22C1/08B22F3/11B22D19/02
Inventor 李烨飞李聪郑巧玲高义民李博刘志伟赵四勇
Owner XI AN JIAOTONG UNIV
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