摘要
研究了原位自生硅颗粒(Si)p增强ZA27基复合材料的铸造法制备工艺以及该材料的力学性能。结果发现:硅含量一定,随浇注温度的降低Sip变大;浇注温度一定,随硅含量的增加Sip也变大。在适宜的浇注温度(750℃)和硅含量(体积分数10%)下,可得到初生硅颗粒形状规则、尺寸细小、分布均匀的Sip/ZA27。硅的加入使材料中形成了大量的缩松,导致力学性能的严重下降。初生硅颗粒的尺寸、形貌对Sip/ZA27的力学性能也产生影响。P变质效果明显,可以提高Sip/ZA27复合材料的力学性能。
The fabrication technique of silicon particle (Sip) reinforced ZA27 in-situ composites (Sip/ZA27) and the resulting mechanical properties were investigated. The results indicates that the size of Sip increased with the decrease of pouring temperature at a certain silicon content. The Sip size also increased with the increase in silicon content at a certain pouring temperature. A Sip/ZA27 composite with fine Sip distributed uniformly can be obtained under an appropriate pouring temperature ( 750℃ ) and a silicon content ( 10vo1% ). The addition of silicon given rise to the formation of large number of porosities, which lead to a significant decrease in mechanical properties. The size and shape of Sip also affected the mechanical properties. The phosphor obviously modified the Sio, and thus could enhance the mechanical properties.
出处
《铸造》
EI
CAS
CSCD
北大核心
2007年第3期270-274,共5页
Foundry
基金
兰州理工大学优秀青年教师培养计划(LUT05011-Y)
甘肃省有色金属新材料重点实验室开放基金(SKL03004)。