高温合金中复杂结构相的电子显微学新认识  

Re-investigation on the complex phases precipitated in superalloys

作　　者：胡肖兵[1,2] 葛华龙 郑士建 马秀良[1] HU Xiao-bing;GE Hua-long;ZHENG Shi-jian;MA Xiu-liang(Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang Liaoning 110016,China;Department of Materials Science and Engineering,Northwestern University,Illinois 60208,United States;School of Materials and Energy,Yunnan University,Yunnan Kunming 650500,China;School of Materials Science and Engineering,Hebei University of Technology,Tianjin 300130,China)

机构地区：[1]中国科学院金属研究所沈阳材料科学国家研究中心,辽宁沈阳110016 [2]西北大学材料科学与工程学院,美国伊利诺伊州60208 [3]云南大学材料与能源学院,云南昆明650500 [4]河北工业大学材料科学与工程学院,天津300130

出　　处：《电子显微学报》2023年第5期665-688,共24页Journal of Chinese Electron Microscopy Society

基　　金：国家重大科研仪器设备研制专项(No.11327901);国家重点基础研究发展计划项目(Nos.2009CB623705,2010CB631206).

摘　　要：高温合金由于其成分比较复杂,进而在热处理及服役过程中不可避免地会产生大量的析出相,如碳化物、硼化物、拓扑密堆相等。这些析出相对高温合金的力学性能有重要影响。准确地解析这些析出相的结构与缺陷以及它们与基体间的位向关系、界面特征可以帮助人们更好地理解其从基体中的析出特性,从而控制其析出行为,对高温合金性能产生有益影响。尽管这些复杂结构相在高温合金中普遍存在,但人们对它们的认识仍然停留在前人基于点阵结构的研究结果上。近年来,基于像差校正电子显微术,本课题组对高温合金中的复杂结构相系统地进行了高空间分辨率的结构解析。本文将概述对这些复杂物相的新认识。Superalloys are usually highly alloyed with many other metallic and non-metallic elements.During the service conditions at high temperature,the supersaturated matrix is usually unstable,which will result in the precipitation of a large number of phases,such as carbides,borides,topologically close-packed phases,and other intermetallic compounds.These precipitates usually have a significant influence on the overall mechanical properties of superalloys.Accurate understanding of the structural characteristics of these precipitates,as well as their orientation relationship and crystallographic features with the matrix,are very helpful for researchers to discuss their precipitation behavior from the matrix and seek ways for the controlled precipitation for improved performance.Despite the widespread presence of these phases in superalloys,our understanding of them still largely relies on early research findings.In recent years,with the flourishing development of aberration-corrected electron microscopy,our research group has made systematic progress in the high-resolution structural characterization of the complex phases in superalloys.This article provides an overview of our new understanding of these complex phases.

关 键 词：高温合金 碳化物 硼化物 拓扑密堆相 合金相 

分 类 号：TB31[一般工业技术—材料科学与工程] V252[航空宇航科学与技术—航空宇航制造工程] O76[理学—晶体学] O77[金属学及工艺—物理冶金] TG115.215.3[金属学及工艺—金属学]