期刊文献+

Si含量对离心铸造Al-8.5Ni-xSi复合材料组织与性能的影响 被引量:6

Effects of Si Content on Structures and Properties of Centrifugal Al-8.5Ni-xSi Composites
下载PDF
导出
摘要 对离心铸造Al-8.5Ni-xSi复合材料铸件的微观组织进行了观察,研究了Si含量对复合材料的组织、硬度和耐磨性的影响。结果表明:Al-8.5Ni-9Si铸件的外层偏聚了较多的初生NiAl3颗粒,内层为无颗粒的基体层;而Al-8.5Ni-14Si,Al-8.5Ni-19Si铸件则形成了具有大量初生NiAl3/Si颗粒的外层增强层,中间无颗粒的基体层以及含有较多初生Si/NiAl3颗粒的内层增强层的三层组织。随着Si含量由9%(质量分数,下同)增加到14%,19%,Al-8.5Ni-xSi铸件增强层的初生NiAl3/Si颗粒体积分数逐渐增大,材料的硬度及耐磨性逐渐增强。在离心场中,初生NiAl3的离心运动与初生Si的向心运动是形成Al-8.5Ni-xSi铸件不同组织的主要原因。 The microstructures of the centrifugal composites Al-8.5Ni-xSi tubes were observed.Effects of Si content on the microstructures,hardness and wear-resistance of the tubes were investigated.The results show that the Al-8.5Ni-9Si tube consists of an outer layer containing some primary NiAl3 and the inner layer of Al matrix.While the Al-8.5Ni-14 Si,Al-8.5Ni-19 Si tubes both have an outer layer segregating many primary NiAl3 and Si particles,the middle layer having no particles and the inner layer containing a few primary NiAl3 and Si particles.The particle volume fractions in the reinforcement layer of the Al-8.5Ni-xSi tubes increase gradually as well as the hardness and the wear resistance with the Si content increasing from 9%(mass fraction,the same below)to 14%and 19%.The centrifugal migration of NiAl3 and the centripetal movement of Si in the centrifugal field play an important role in the formation of the Al-8.5Ni-xSi tubes which have various structures.
出处 《材料工程》 EI CAS CSCD 北大核心 2015年第2期53-60,共8页 Journal of Materials Engineering
关键词 Al-8.5Ni-xSi复合材料 初生NiAl3 Si 硬度 耐磨性 离心铸造 Al-8.5Ni-xSi composites primary NiAl3 Si hardness wear centrifugal casting
  • 相关文献

参考文献16

二级参考文献38

  • 1王晖,任忠鸣,徐匡迪,黄晖,王秋良,严陆光.强磁场作用下Al-Ni合金中Al3Ni析出相的凝固行为[J].稀有金属材料与工程,2005,34(7):1033-1035. 被引量:14
  • 2徐建辉 邓克明.铝硅合金中的共晶硅.新材料研究(下卷)[M].中国科协学会工作部,1988,4..
  • 3团体著者,金相分析,1982年,120页
  • 4团体著者,轻金属材料加工手册,1979年,112页
  • 5TORRALBA J M,DA COSTA C E,VELASCO F. P/M aluminum matrix compositesz an overview[J]. Journal o{ Materials Process- ing Technology,2003,133(1--2) :203--206.
  • 6YAN Y W, GENG L, LI A B. Effects of particle size on residual stresses of metal matrix composites[J]. Transactions of Nonfer- rous Metals Society of China, 2006 : 1 -- 2.
  • 7KORTHAUER M, ATAYA S, MAGI) E. Effects of deformed volume, volume fraction and particle size on the deformation be- haviour of W/Cu composites[J]. Theoretical and Applied Frac- ture Mechanics, 2006,46(1) :38--45.
  • 8LEWANDOWSKI J J, IAU S,I.IU C. Observation on the effects of particulate size and superposed pressure on deformation of met- al matrix composites[J]. Seripta MetaIlurgiea et Materialia, 1991, 25 (i):21--26.
  • 9ARP()N R, MOI.INA M, NARCISO J. Thermal expansion be- haviour of aluminium/SiC composites with bimodal particle dis- trlbutlons[J]. Acta Materialia,2003, 54 (11) :3145--3156.
  • 10HUM S. Some effects of particle size on the flow behavior of A1- SiCp composites[J]. Scripta Metallurgica et Materialia,1991, 25 (3) :695--700.

共引文献44

同被引文献35

引证文献6

二级引证文献12

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部