期刊
ACTA MATERIALIA
卷 91, 期 -, 页码 202-216出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2015.03.013
关键词
CALPHAD; Grain boundary complexion; Interfacial thermodynamics; Materials Genome Initiative; Premelting
资金
- Aerospace Materials for Extreme Environments program of the U.S. Air Force Office of Scientific Research (under the AFOSR) [FA9550-10-1-0185, FA9550-14-1-0174]
- DOE-NETL [DE-FE0011291]
- NSF [CMMI-1436305]
- National Security Science and Engineering Faculty Fellowship (ONR) [N00014-15-1-0030]
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1436305] Funding Source: National Science Foundation
Impurity-based, premelting-like, intergranular films (IGFs, a common type of grain boundary complexion) can form in various materials and influence sintering, creep, and microstructure development. A thermodynamic framework is presented to forecast the formation and stability of these premelting-like grain boundary complexions (a.k.a. interfacial phases that are thermodynamically two dimensional) in multicomponent alloys to consider the interactions of multiple alloying elements. Key thermodynamic parameters that control the interfacial segregation and disordering behaviors have been identified and systematically examined. Subsequently, ternary and quaternary grain boundary diagrams have been computed and used to forecast the sintering behaviors of W-Ni-M (M = Fe, Co, Cr, Zr, Nb and Ti) and Mo-Si-B-M (M = Ni, Co and Fe) systems. This work supports a long-range scientific goal of extending bulk computational thermodynamics and CALPHAD methods to interfaces and developing grain boundary complexion (interfacial phase) diagrams as extensions to bulk phase diagrams, which can be a generally useful materials science tool. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据