制备条件对Zr基大块金属玻璃复合材料组织与性能的影响

孙国元; 陈光; 陈国良

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制备条件对Zr基大块金属玻璃复合材料组织与性能的影响
Effects of Processing Conditions on Microstructure and Mechanical Properties of Zr-based Bulk Metallic Glass Composites
2006年第4期页码：250-252
纸质出版日期： 2006 ，
DOI：

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[1]孙国元,陈光,陈国良.制备条件对Zr基大块金属玻璃复合材料组织与性能的影响[J].特种铸造及有色合金,2006(04):250-252+192.

Sun Guoyuan, Chen Guang, Chen Guoliang. Effects of Processing Conditions on Microstructure and Mechanical Properties of Zr-based Bulk Metallic Glass Composites[J]. Special Casting & Nonferrous Alloys, 2006,(4):250-252.
[1]孙国元,陈光,陈国良.制备条件对Zr基大块金属玻璃复合材料组织与性能的影响[J].特种铸造及有色合金,2006(04):250-252+192. DOI：

Sun Guoyuan, Chen Guang, Chen Guoliang. Effects of Processing Conditions on Microstructure and Mechanical Properties of Zr-based Bulk Metallic Glass Composites[J]. Special Casting & Nonferrous Alloys, 2006,(4):250-252. DOI：

摘要

分别采用低压铸造/水冷铜模急冷成形和熔体水淬的方法制备了Zr56.2Ti13.8Nb5.0Cu6.9Ni5.6Be12.5内生β相/BMG基体复合材料

表征了材料的微观组织特性

测试了材料的室温压缩性能。结果表明

复合材料的微观组织特性

包括β相的体积分数、形貌和尺寸等

对其制备条件是非常敏感的。不同的制备方法、不同的试样形状与尺寸提供了不同的熔体冷却速率。相对低的熔体冷速导致了更多、更粗大的β相的形成;复合材料的室温压缩性能取决于其微观组织特性

多而粗大的β相使材料的宏观塑性应变明显增加。

Abstract

In-situ β phase/Zr

56.2Ti

13.8Nb

5.0Cu

6.9Ni

5.6Be

12.5 BMG （bulk metallic glass composites ）composites were prepared by low pressure casting combining with water-cooling copper mould and by the melt water-quenching method

respectively.The microstructure and ambient compressive properties of the composites were investigated.It is revealed that the microstructure characteristics of the composites

including the volume fraction

morphology and size of β phase

sensitively depends on the processing conditions.Lower cooling rate can result in the formation of more and coarser β phase

in which different preparation methods

sample shapes and size can lead to different cooling rate.Ambient compressive properties of the composites are controlled by microstructural characteristics

where more and coarser β phase can significantly improve the macro-plasticity of the composites.