摘要
采用粉末冶金瞬时液相烧结法制备Al-Fe-Si/Al原位复合材料。利用X射线衍射仪(XRD)、扫描电镜(SEM)、能谱分析(EDS)以及M-2000型磨损试验机研究Al含量对原位复合材料的微观结构、硬度和耐磨性的影响。结果表明:随着Al含量的增加,粗大FeAl相消失,针状的金属间化合物增强体Al0.5FeSi0.5长大成短棒状。当Al质量分数为77%时,细小的短棒状Al0.5FeSi0.5增强相弥散分布在基体中,复合材料硬度HV具有最高值283.7,其硬度约是纯铝的8倍,铝硅合金的2.5倍;复合材料的耐磨性约为纯铝的6.6倍,铝硅合金的4.5倍;耐磨性能最佳,磨损率为0.3781%,磨损机制为磨粒磨损。
The Al-Fe-Si/Al in-situ composite was prepared by the powder metallurgy transient liquid phase sintering method.The influence of Al content on microstructure,hardness and wear resistance of in-situ composites was investigated by X-ray diffraction （XRD）,scanning electron microscopy （SEM）,energy dispersive spectroscopy（EDS） and M-2000 wear tester.The results show that the coarse FeAl phases disappear; the needle shapeqike Al0.5FeSi0.5 intermetallic compound reinforcement grows into short bar when the content of aluminum increases.When the mass fraction of aluminum is 77％,the fine short-bar Al0.5FeSi0.5 reinforcement distributes meanly in the matrix,the hardness of composites has a peak value（283.7）,which is 8 times that of pure aluminum and 2.5 times that of alu minum silicon alloy.The wear resistance is the best （wear rate is 0.378l％）,which is 6.6 times that of pure aluminum and 4.5 times that of aluminum silicon alloy.The wear mechanism is mainly abrasive wear.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2014年第4期7-12,共6页
Journal of Materials Engineering
基金
国家自然科学基金资助项目(51001047
51165008)
江西省科技厅科研项目资助(20122BDH80021
2012BBE5001)
江西省教育厅科研项目资助(GJJ12282
GJJ11020)
关键词
瞬时液相烧结
铝含量
原位自生
微观结构
硬度
耐磨性
transient liquid phase sintering
Al content
in-situ
microstructure
hardness
wear resistance
