摘要
采用粉末冶金法制备了SiC晶须增强镁基复合材料(SiCw/MB15)试样。通过检测基体显微硬度探讨了SiCw对镁合金时效规律的影响,并借助扫描电镜(SEM)、透射电镜(TEM)和拉伸试验,研究了混粉方式对复合材料室温力学性能、SiCw分布及显微结构的影响。结果表明,MB15及其复合材料的时效硬化曲线上均存在双峰现象;SiCw的加入既提高了MB15的硬度,又加快了其时效速度;混粉方式对晶须分布及SiCw/MB15复合材料的室温力学性能影响很大。
Specimens of MB15 magnesium alloy reinforced with SiC whiskers (SiCw/MB15) were fabricated using powder metallurgy route (PM). The influence of SiCw on the 150 degrees C aging behavior of MB15 alloy was investigated by microhardness-testing, and SEM, TEM and tensile tests studied the influence of powder-mixing methods on the distribution of SiCw and the mechanical properties of SiCw/MB15. The results reveal that the double peaks exist in the age-hardening curves of both the unreinforced and the reinforced MB15 alloy, and the addition of SiCw can accelerate the age-hardening process of MB15 alloy apart from increasing its micro- hardness, moreover, the mechanical properties of SiCw/MB15 composite are significantly influenced by powder-mixing methods of PM.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2005年第7期1131-1134,共4页
Rare Metal Materials and Engineering
基金
国家自然科学基金(59771016)
科技部重大项目前期专项(02061005)
陕西省自然科学基金(2003E117)资助
