摘要
以AlSi粉末为基体,TiH2作为发泡剂,通过研究冷压和热压两种粉末冶金工艺制备泡沫铝,分析冷压压力和热压温度对前驱体相对密度和泡沫铝孔结构的影响。实验表明,提高冷压压力和热压温度均可增加前驱体相对密度,当冷压压力超过400 MPa后对泡沫铝孔结构、膨胀率和孔隙率没有明显改善的趋势。增加热压温度可促进Al-Si共晶相生成并稳定泡沫结构。在450℃热压温度下,可制得孔结构良好、孔隙率为81.7%泡沫铝。
Using AlSi powder as the matrix and TiH 2 as the foaming agent,foamed aluminum was prepared through cold pressing and hot pressing powder metallurgy processes in the study.The impact of cold pressing stress and hot pressing temperatures on the precursor relative density and pore structure of foamed aluminum was analyzed.It was found that raising both the cold pressing stress and hot pressing temperature improved precursor relative density.However,once the cold pressing stress exceeded 400 MPa,no significant improvement was noted in the foamed aluminum's pore structure,expansion ratio or porosity.Increasing the hot pressing temperature led to the production of Al-Si eutectic phase,achieving a stabilized foam structure.Foamed aluminum with a good pore structure and a porosity of 81.7%was produced at a hot pressing temperature of 450℃.
作者
陈星宇
黄闻战
赵爱春
陈鹏
陈尧
张玉洁
Chen Xingyu;Huang Wenzhan;Zhao Aichun;Chen Peng;Chen Yao;Zhang Yujie(College of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China)
出处
《轻金属》
2024年第3期42-48,共7页
Light Metals
基金
博士启动基金(20192066)
来晋优秀博士基金(20202021)
山西省高等学校科技创新(2020L0342)。
关键词
泡沫铝
冷压
热压
相对密度
孔隙率
孔结构
foamed aluminum
cold pressing
hot pressing
relative density
porosity
pore structure
