Pore formation mechanism and intermetallic phase transformation in Ti-Al alloy during reactive sintering

被引：3

作者：

Kayani, Saif Haider ^{[1
]}

Cui, Min ^{[2
]}

Ahmed, Rana Tariq Mehmood ^{[3
]}

Cho, Young -Hee ^{[1
]}

Lee, Jung-Moo ^{[1
]}

Park, Nho-Kwang ^{[1
]}

Ajmal, Hafiz Muhammad Salman ^{[3
]}

Euh, Kwangjun ^{[1
,4
]}

机构：

[1] Korea Inst Mat Sci KIMS, Adv Met Div, Chang Won 51508, South Korea

[2] Changwon Natl Univ, Dept Mat Sci & Engn, Chang Won 51140, South Korea

[3] Univ Engn & Technol Narowal Campus, Dept Elect Engn, Lahore, Pakistan

[4] Korea Univ Sci & Technol UST, Adv Mat Engn, Daejeon 34113, South Korea

来源：

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2023年 / 22卷

基金：

新加坡国家研究基金会;

关键词：

Titanium aluminide; Heating rate; Intermetallic compound; Exothermic reaction; HIGH-TEMPERATURE SYNTHESIS; CRYSTALLOGRAPHY OPEN DATABASE; OPEN-ACCESS COLLECTION; THERMAL-EXPLOSION; POROUS ALLOYS; HIGH NB; COMBUSTION SYNTHESIS; TITANIUM; MICROSTRUCTURE; ALUMINA;

D O I：

10.1016/j.jmrt.2022.12.056

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The mechanism of pore formation associated with intermetallic reaction is studied in sintered Ti50Al50 alloy with two different heating rates i.e. 1 degrees C/min and 10 degrees C/min. The heating rate significantly influences the pore parameters and the intermetallic reactions. The pore size and porosity increase with the extent of exothermic reactions during sintering. The intermetallic Ti2Al5 phase forms by a low-temperature solid-state diffusion of Al at the surface of Ti skeletons, while TiAl3 and TiAl2 intermetallic phases form at a high temperature owing to Ti2Al5 phase reaction with Al and Ti, respectively. A considerable change in thermal and volume expansion take place in the alloy heated with 10 degrees C/min compared to 1 degrees C/min. Therefore, it is found that the heating rate during sintering greatly influences the porous properties of Ti50Al50 by controlling the degree of exothermic reactions.(c) 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

引用

页码：1878 / 1887

页数：10

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