Sedimentation Process and Phase Transition of Solids Under High Gravity  

超重力下的沉降过程与固态相变

作　　者：Wang Jiahui Zhao Xinbao Yue Quanzhao You Fangjie Xia Wanshun Gu Yuefeng Zhang Ze 王嘉晖;赵新宝;岳全召;尤方杰;夏万顺;谷月峰;张泽(浙江大学材料科学与工程学院高温合金研究所,浙江杭州310027;浙江大学工程师学院,浙江杭州310027;浙江大学材料科学与工程学院硅及先进半导体材料全国重点实验室,浙江杭州310027)

机构地区：[1]Institute of Superalloys Science and Technology,School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China [2]Polytechnic Institute,Zhejiang University,Hangzhou 310027,China [3]State Key Laboratory of Silicon and Advanced Semiconductor Materials,School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China

出　　处：《稀有金属材料与工程》2024年第9期2468-2477,共10页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51988101);Fundamental Research Funds for the Central Universities(226-2022-00050)。

摘　　要：The recent progress and future prospects for ultra-centrifugal sedimentation in solids are described,mainly involving equipment,miscible systems and compounds.Almost 90%ultracentrifugation experiments were performed on the 1st and 2nd high-temperature ultracentrifuge which is typically operated at temperatures below 500℃ under the maximum centrifugal acceleration up to 106 g.The strong gravitational and temperature fields induce atomic-scale graded structure,grain growth and refinement,and voids accumulation caused by the atomic sedimentation in miscible systems.New structures,properties and substances are produced in some compounds.A new cantilever high-temperature ultracentrifuge with a test temperature up to 1200℃ is under construction at Zhejiang University,making it possible to simulate the composition,microstructure and property evolution of superalloys in the operating environment of aircraft engines.介绍了超离心状态下固体中沉降过程的最新进展以及未来应用前景,主要涉及高温超速离心设备、互溶体系以及化合物材料中的超重力固态相变。近90%的固态超速离心实验是在世界第一台(熊本大学)与第二台(日本原子能研究所)高温超速离心机上,以500℃以下的温度与106 g的最大离心加速度条件运行。强大的超重力场和温度场诱导材料中出现原子级梯度结构、晶粒生长与细化以及空位聚集等现象,并产生了新的物相结构与特性。浙江大学建造了一种实验温度高达1200℃的新型悬臂式高温超速离心机,为模拟高温合金在航空发动机运行环境中的合金成分、微观结构和性能演变提供了设备基础。

关 键 词：high gravity SEDIMENTATION DIFFUSION SUPERALLOY 

分 类 号：TG1[金属学及工艺—金属学]