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High-temperature self-lubricating composite material as well as preparation method and application thereof

A technology of high-temperature self-lubricating and composite materials, which is applied in the field of wear-resistant materials, can solve problems such as pyrolysis, and achieve the effects of low synthesis temperature, promotion of material transfer, and easy activation

Pending Publication Date: 2022-04-01
CHENGDU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method uses spark plasma sintering (SPS) technology to complete the preparation of bulk materials in a relatively low temperature and in a short period of time, which can solve the problem of Ti 3 SiC 2 The problem of pyrolysis

Method used

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  • High-temperature self-lubricating composite material as well as preparation method and application thereof
  • High-temperature self-lubricating composite material as well as preparation method and application thereof
  • High-temperature self-lubricating composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of Ti 3 SiC 2 The preparation method of / Cu high temperature self-lubricating composite material comprises the following steps:

[0026] Ti 3 SiC 2 powder and Cu powder according to the volume ratio V(Ti 3 SiC 2 ): V(Cu)=90:10; mix evenly, put it into a graphite mold, and sinter in a spark plasma sintering system with a vacuum degree of less than 100Pa and a pulse ratio of 36:6. After heating up to 1100°C at a rate of 50°C / min, keep it warm for 5 minutes and then lower it to 1000°C, hold it for 15 minutes. During the sintering process, the sintering pressure is always 35MPa. Get Ti 3 SiC 2 / Cu high temperature self-lubricating composite material.

Embodiment 2

[0028] A kind of Ti 3 SiC 2 The preparation method of / Cu high temperature self-lubricating composite material comprises the following steps:

[0029] Ti 3 SiC 2 powder and Cu powder according to the volume ratio V(Ti 3 SiC 2 ): V(Cu)=85:15; mix evenly, put it into a graphite mold, and sinter in a spark plasma sintering system with a vacuum degree of less than 100Pa and a pulse ratio of 36:6. The heating rate was raised to 1050°C at a rate of 50°C / min, then lowered to 1000°C after holding for 5 minutes, and held for 15 minutes. During the sintering process, the sintering pressure was always 35MPa. Ti 3 SiC 2 / Cu high temperature self-lubricating composite material.

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Abstract

The invention discloses a high-temperature self-lubricating composite material as well as a preparation method and application thereof, and relates to the technical field of wear-resistant materials. The preparation method comprises the following steps that after Ti3SiC2 powder and Cu powder are evenly mixed, under the vacuum condition, a spark plasma sintering process is adopted, the temperature is increased to 850-1350 DEG C, sintering is conducted for 5-10 min, then the temperature is decreased to 650-1100 DEG C, heat preservation is conducted for 10-20 min, and the Ti3SiC2 / Cu high-temperature self-lubricating composite material is obtained. According to the invention, a spark plasma sintering (SPS) technology is adopted, the preparation of the block material is completed at a relatively low temperature within a relatively short time, and the problem of high-temperature decomposition of Ti3SiC2 can be solved.

Description

technical field [0001] The invention relates to the technical field of wear-resistant materials, in particular to a Ti 3 SiC 2 / Cu high temperature self-lubricating composite material and its preparation method and application. Background technique [0002] Ti 3 SiC 2 It is a very promising ternary layered machinable ceramic material discovered in recent years, which has dual properties of metal and ceramic. Good electrical and thermal conductivity, low microhardness, excellent thermal shock resistance, machinability, plasticity at high temperature, and metallic properties; and high elastic modulus, high melting point, high Chemical stability, high high temperature mechanical strength and good oxidation resistance, showing ceramic characteristics. [0003] Scholars usually prepare Ti by hot isostatic pressing, chemical reaction, and self-propagation. 3 SiC 2 However, these methods have disadvantages such as high sintering temperature and long preparation time. Due to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/06C22C1/05B22F3/105
Inventor 张瑞陈彪吴晨龙马帅张慧铭孙淼
Owner CHENGDU UNIV
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