摘要
采用熔体反应法,并在反应过程中施加高能超声,合成了(Al2O3+Al3Zr)p/A356复合材料。XRD和SEM分析表明,生成的增强颗粒为Al2O3和Al3Zr;颗粒尺寸细小,平均粒径尺寸为1μm,在基体中均匀分布;共晶Si在高能超声作用下显著细化,变短并呈粒状。研究表明,经过高能超声处理后,其抗拉强度比未加高能超声处理的复合材料提高了近20%,达到了381.4MPa。
In-situ (Al2O3+Al3Zr)p/A356 composites were synthesized by direct melting reaction combining with high intensity ultrasonic. The microstructure and properties of synthesized composites were investigated by XRD(X-ray diffraction) and SEM (scanning electron microscope). It is found that the reinforcements Al2O3 and Al3Zr with average size of 1μm can be observed in the matrix alloy,which is uniformly distributed into the composites. Eutectic Si phase in A356 alloy can be broken into Si particle by high intensity ultrasonic,exhibiting great refinement effects. The tensile strength of ultrasonic treated composites reaches up to 381.4 MPa,which is increased by about 20% compared with that of ones without treated by high intensity ultrasonic.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2008年第5期385-387,共3页
Special Casting & Nonferrous Alloys
基金
教育部重点基金资助项目(207038)
江苏省高技术研究资助项目(BG2005026)
江苏省"六大人才高峰"资助项目(06-D-021)
江苏省材料摩擦学重点实验室开放基金资助项目(Kjsmcx06003)
博士点基金资助项目(NO20060299006)
关键词
高能超声
原位反应
铝基复合材料
力学性能
High Intensity Ultrasonic,In-situ Reaction,Aluminum Matrix Composites,Mechanical Properties
