铝合金熔体中TiB2粒子原位沉淀析出行为研究  

Precipitation Behavior of In-situ TiB_(2) Particles in Aluminum Alloy Melt

作　　者：杨林洁 张丽丽[1,2] 赵九洲[1,2] 江鸿翔[1,2] 何杰[1,2] YANG Linjie;ZHANG Lili;ZHAO Jiuzhou;JIANG Hongxiang;HE Jie(Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sci-ences,Shenyang 110016;School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016)

机构地区：[1]中国科学院金属研究所,师昌绪先进材料创新中心,沈阳110016 [2]中国科学技术大学材料科学与工程学院,沈阳110016

出　　处：《特种铸造及有色合金》2024年第6期823-829,共7页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51901231,51974288,52174380);辽宁省自然科学基金资助项目(2023-MS-023);广西科技计划资助项目(2023AA08013);福建省科技计划资助项目(2021T3030)。

摘　　要：研究了熔体反应温度、熔体过饱和度对TiB2粒子自铝合金熔体中的沉淀析出行为的影响;建立了描述铝合金熔体中TiB2粒子沉淀析出行为的模型,模拟分析了TiB2粒子的形核、长大行为及其对TiB2粒子尺寸分布的影响。结果表明,TiB2粒子的沉淀析出行为及其尺寸分布与熔体反应温度、过饱和度和冷却速度密切相关;当熔体反应温度较低(即熔体过饱和度较大)、熔体冷却速度较快时,有利于获得尺寸细小、尺寸分布集中的TiB2粒子。Effects of reaction temperature and supersaturation on precipitation behavior of TiB_(2) particles in aluminum alloy melt were experimentally investigated.A model was proposed to describe the precipitation behavior of TiB_(2) par⁃ticles in the aluminum alloy melt.The nucleation and growth behavior of TiB_(2) particles and effects on the size distribu⁃tion were analyzed.The results indicate that the precipitation behavior and size distribution of TiB_(2) particles are closely related to the reaction temperature,supersaturation and cooling rate of the melt.Lower reaction temperature and high cooling rate are beneficial to obtain finer TiB2 particles with concentrated distribution.

关 键 词：TiB2粒子 形核 长大 尺寸分布 模拟 

分 类 号：TG111.4[金属学及工艺—物理冶金] TG146.21[金属学及工艺—金属学]