Dimension Stability of Heat Recycled SiCp/Al Composites

Zhang Jianyun~

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Dimension Stability of Heat Recycled SiCp/Al Composites
Issue 7, Pages: 442-444(2005)
Published： 2005 ，
DOI：

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[1]张建云,孙良新,周贤良,华小珍.SiCp/Al复合材料热循环后尺寸稳定性[J].特种铸造及有色合金,2005(07):442-444+384.

Zhang Jianyun~. Dimension Stability of Heat Recycled SiCp/Al Composites. [J]. Special Casting & Nonferrous Alloys (7):442-444(2005)
[1]张建云,孙良新,周贤良,华小珍.SiCp/Al复合材料热循环后尺寸稳定性[J].特种铸造及有色合金,2005(07):442-444+384. DOI：

Zhang Jianyun~. Dimension Stability of Heat Recycled SiCp/Al Composites. [J]. Special Casting & Nonferrous Alloys (7):442-444(2005) DOI：

摘要

采用无压渗透法制备了SiCp/Al复合材料

经过不同预处理

以及含不同组元的SiCp/Al复合材料

在热机械分析仪中进行20～180℃热循环

测试复合材料热循环后的长度变化。以单位长度的变化

即残余应变来分析热循环后尺寸稳定性。结果表明

SiCp/Al复合材料在热循环后会产生残余应变

残余应变随热循环次数增加而减小

尺寸趋于稳定。预处理的不同

热循环后残余应变也不同

冷热循环预处理的热循环后残余应变最小。SiCp/Al复合材料中颗粒尺寸较大以及基体较硬

则复合材料热循环后尺寸稳定性也较高。

Abstract

The length changes of different preheated SiCp/Al composites with varied compositions prepared by pressure free infiltration method were measured by TMA （thermal mechanical analysis） after heat recycled at 20～180 ℃

in which the unite length changes

mamely residual strain

was used to analyze the dimensional stability.The results show that residual strain occuring in heat recycled SiCp/Al composites is reduced to be a constant value with the increase of heat recycling times.There exists different residual strain at different pretreatment

in which the minimum residual strain can be obtained by cooling-heating recycled pretreatment.SiCp/Al composites with a big particle size and hard matrix possesses a higher dimensional stability after heat recycle.