The Fabrication Technique and Mechanical  Properties of SiCp/ZA27 Composites

Hao Yuan  Chen Tijun  Ma Ying

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The Fabrication Technique and Mechanical Properties of SiCp/ZA27 Composites
Issue S1, Pages: 49-51(2002)
Published：2002
DOI：
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[1]郝远,陈体军,马颖.SiCp/ZA27复合材料的制备及其力学性能[J].特种铸造及有色合金,2002(S1):49-51+57. DOI：

Hao Yuan Chen Tijun Ma Ying. The Fabrication Technique and Mechanical Properties of SiCp/ZA27 Composites[J]. Special Casting & Nonferrous Alloys, 2002, (S1): 49-51. DOI：

摘要

探讨了半固态机械搅拌法制备SiCp/ZA2 7复合材料的工艺

以及SiCp含量、大小对复合材料抗拉强度和硬度的影响

并对其抗拉断口进行了SEM分析。结果表明 :用该工艺可制得SiCp分布较均匀的锌基复合材料

其强度随SiCp含量、粒度的增大而减小 ;经SEM分析

其断口呈部分韧性断裂

且断裂机制因SiCp含量、大小的不同而不同 ;当复合材料中V（SiCp） <5 %时

其硬度值随加入量的增加而升高

当V（SiCp） >5 %时

随含量增加而降低

且小颗粒SiCp增强复合材料的硬度比大颗粒的要高

Abstract

The Casting technique of fabricating SiCp/ZA27 by mechanical stirring of semi solid slurry and the effects of SiCp content and size on tensile and hardness of the composites have been discussed. The fracture surfaces of the composites have been examined by SEM. The results indicate that SiCp/ZA27 with uniform distribution of SiCp can be obtained. The tensile strength decreases with the increasing of SiCp content and size. The apprearance of fracture is characterized by partial dimples

and formation mechanism is different with variance in SiCp content and size. The hardness of composites increases with the increasing of SiCp content V （SiCp）<5%

while it decreases at SiCp content V （SiCp）>5%. The hardness of composites reinfored by finer SiCp is higher than that of composites reinfored by coarser.