摘要
将轧制复合工艺应用于发泡预制体的制备,研究了粉末致密化过程与面板/芯层的结合机制。结果表明:轧制复合工艺可使芯层粉末获得理想的致密度,压下率为67%时,粉末的相对密度可达99.87%,较适宜的压下率为60%～70%。轧制作用下,粉末致密化的机制为机械结合。压下率较小时,发生粉末的流动、剪切;压下率较大时,粉末在进入变形区后瞬间即被压实。面板/粉末的结合方式为粉末颗粒对面板表面的填充、塞积。
The technology of roll-bonding was applied to prepare the foaming precursor in this paper. The densification of powder and the bonding mechanism of face panel/core powder were investigated. The results show that the roll-bonding technology enables the core powder to get ideal densification. When the reduction rate is 67%, the relative density of powder can reach 99.87%. The optimizing reduction rate should be controlled at 60%-70%. Mechanical bond is the mechanics of powder densification under rolling. When reduction rate is small, the flowing and shearing of the powder occur; when reduction is large, the powder will be compacted while it enters the deformed area. The bonding way of panel/powder is powder particle filling into the face panel .
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2008年第3期485-489,共5页
Rare Metal Materials and Engineering
基金
国家自然科学基金项目(50704012)
辽宁省企业博士后项目(2005921035)
关键词
发泡预制体
轧制复合
粉末
致密度
机械结合
foaming precursor
roll-bonding
powder
densification
mechanical bond
