摘要
采用粉末冶金梯级烧结法结合NH4HCO3造孔剂成功制备出具有高等效内耗值的多孔Al-30Zn合金,并对其微观结构、相组成、硬度、阻尼性能及储能模量进行研究。结果表明,通过添加NH4HCO3造孔剂能有效地控制多孔Al-30Zn合金的孔隙率,形成较大的闭孔结构孔隙,且无新相生成;随着造孔剂添加量增加,多孔Al-30Zn合金的硬度逐渐降低;在300~350℃时,添加8%造孔剂的Al-30Zn合金等效内耗值明显高于未加造孔剂的Al-30Zn合金,其中在300℃时,添加8%造孔剂的Al-30Zn合金等效内耗值高达0.082,较未加造孔剂的Al-30Zn合金提高了54.7%;多孔Al-30Zn合金试样的储能模量随着温度的升高和造孔剂添加量的增大而下降。
Porous Al-30 Zn alloy with high equivalent internal consumption value was prepared successfully by powder metallurgy step sintering method combined with NH4HCO3pore-making agent,and its microstructure,phase composition,hardness,damping performance and energy storage modulus were analyzed.The results reveal that the porosity of porous Al-Zn alloy can be effectively controlled by adding NH4HCO3 pore-forming agent,and a large closed pore structure can be formed without new phase formation.The hardness of porous Al-30 Zn alloy is decreased gradually with the increase of pore forming agent content.At 300℃ to 350℃,equivalent internal friction values of Al-30 Zn alloy with the 8% pore-forming agent addition are significantly higher than that of ones without pore-forming agent,and at 300℃,the equivalent internal friction of Al-30 Zn alloy with 8% pore-forming agent reaches up to 0.082,which is 54.7% higher than that of Al-30 Zn alloy without pore-forming agent.The energy storage modulus of porous Al-30 Zn alloy is decreased with the increase of temperature and the addition of pore-forming agent.
作者
周高峰
江鸿杰
刘崇宇
黄宏锋
韦莉莉
王一博
Zhou Gaofeng;Jiang Hongjie;Liu Chongyu;Huang Hongfeng;Wei Lili;Wang Yibo(Key Laboratory of New Processing Technology for Nonferrous Metal&Materials,Ministry of Education,Guilin University of Technology;College of Materials Science and Engineering,Guilin University of Technology)
出处
《特种铸造及有色合金》
CAS
北大核心
2019年第12期1384-1387,共4页
Special Casting & Nonferrous Alloys
基金
广西中青年教师基础能力提升计划资助项目(2018KY0254)
广西科技重大专项资助项目(桂科AA17202007)
桂林理工大学博士科研启动基金资助项目(GUTQDJJ2014016)
作者简介
第一作者:周高峰,男,1992年出生,硕士研究生,广西桂林(541004),电话:15677372076,E-mail:1048013619@qq.com;通信作者:江鸿杰,男,1980年出生,讲师,广西桂林(541004),电话:18172658566,E-mail:jhj2014@glut.edu.cn。
