摘要
采用半固态搅拌技术向铝熔体中加入SiO_2粉末,通过熔体原位反应成功制备了α-Al_2O_(3p)/ZL109复合材料,并在不同挤压力下对复合材料进行了成形试验。利用扫描电镜和X射线衍射仪对复合材料的微观组织和相组成进行了分析,并测试了其力学性能。结果表明,挤压铸造原位α-Al_2O_(3p)/ZL109复合材料铸件内部缺陷少、增强颗粒均匀分散;挤压铸造后,复合材料在铸态和热处理态的抗拉强度、硬度、伸长率均明显高于ZL109合金,且随挤压力增加而提高。
Alumina particle reinforced aluminum matrix composites were prepared successfully by in-situ reaction in melt after adding SiO2 powder into aluminum melt via semi-solid mechanical stirring technique.The fabrication of the composites under different squeezing pressures was also investigated.The micro-structure and phase constituent of the composites prepared were analyzed by scanning electron microscope and X-ray diffraction,meanwhile,the tensile properties of the composites were measured.The results reveal that the internal defects of squeeze-casting composites are decreased greatly,and the reinforcement particles are distributed homogeneously into the composites.With the increase of squeezing pressure,the tensile strength,hardness and elongation of both the as-cast and T6heat-treated composites are the higher than those of the matrix ZL109 alloy.Meanwhile,these properties are increased with the increase of squeezing pressure.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2017年第1期83-86,共4页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(51174098)
江苏省科技支撑资助项目(BE2012135)
江苏省高校优势学科建设工程资助项目(2014)
江苏省重大科技成果转化项目(BA2014112)
高等学校博士学科点专项科研基金资助项目(20133227110023)
