材料科学与工程学报2012，Vol.30Issue(4)：562-566,5.
Ca对Mg-8Zn-3.2Al-0.9Si-0.3Mn合金显微组织及性能的影响
Effects of Ca on the Microstructure and Properties of Mg-8Zn-3.2AI-0. 9Si-0.3Mn Alloy
摘要
Abstract
Effects of Ca on the as-cast microstructure of Mg-8Zn-3.2Al-0.9Si-0.3Mn alloy, especially on the modification and/or refinement of Mg2 Si phase in the alloy, were investigated by optical microscopy（OM）, X-ray diffractometry （XRD） and scanning electron microscopy （SEM） with energy dispersive spectrometry （EDS）, etc. The results show that the morphology of Mg2 Si changed from Chinese script-type to small polygonal type and the matrix microstructure is refined by adding Ca. The modification mechanisms of Mg2 Si are that CaSi2 particles provide the heterogeneous nucleation sites for Mg2 Si phase and Ca influences the growth of Mg2 Si phase as the surface-active element. Owing to the improvement of microstructure, the mechanical properties of the alloys containing Ca as comparing with the base alloy at both ambient and elevated temperatures are increased.关键词
镁合金/Ca/显微组织/力学性能Key words
magnesium alloy/Ca/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
李少华,张春香,关绍康,文春领,田海棠,于雯雯,孟辉..Ca对Mg-8Zn-3.2Al-0.9Si-0.3Mn合金显微组织及性能的影响[J].材料科学与工程学报,2012,30(4):562-566,5.基金项目
国家科技型中小企业技术创新基金资助项目 （）
