反重力渗流铸造法制备开孔泡沫铝材料  

Preparation of open-celled aluminum foams by countergravity infiltration casting

作　　者：王辉[1] 文康[1] 周向阳[1] 李劼[1] 

机构地区：[1]中南大学冶金与环境学院,长沙410083

出　　处：《有色金属科学与工程》2013年第3期25-29,共5页Nonferrous Metals Science and Engineering

基　　金：国家自然科学基金资助项目(51274240)

摘　　要：采用反重力渗流铸造法成功制备了开孔泡沫铝材料,分析了材料的准静态压缩性能及主要制备工艺参数与开孔泡沫铝空隙度之间的关系.研究结果表明:采用反重力渗流铸造法所制备的泡沫铝几乎没有宏观缺陷,孔洞分布均匀、孔壁结构完整;泡沫铝的空隙度对其压缩性能的影响很大,泡沫铝的屈服强度与平台应力均随空隙度的降低而升高;提高粒子预热温度、增大保压压力或延长保压时间,均有助于降低空隙度.The open celled aluminum foams were prepared by counter-gravity infiltration casting system. The quasi-static compression performance and the relationship between void content and the main preparation process parameters were investigated. The experimental results show that there is hardly macro-defect in the foam samples prepared by counter-gravity infiltration casting. The foam materials exhibit uniform pores distri- bution and structural integrity of every pore. The void content affects the mechanical properties of aluminum foams strongly. The yield stress and plateau stress significantly increase with the decrease of void content. Raising pre-heating temperature, increasing packing pressure and extending dwell time are effective to lower the void content in aluminum foams.

关 键 词：反重力渗流铸造 开孔泡沫铝 空隙度 准静态压缩性能 

分 类 号：TG146.4[一般工业技术—材料科学与工程]