Stability of Y-Ti-O nanoparticles during laser melting of advanced oxide dispersion-strengthened steel powder

被引：21
|
作者：
Chang, Hye Jung [1 ]
Cho, Hye Young [1 ]
Kim, Jeoung Han [2 ]
机构：
[1] Korea Inst Sci & Technol, Adv Anal Ctr, Seoul, South Korea
[2] Hanbat Natl Univ, Dept Adv Mat Engn, Daejeon, South Korea
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 653卷
基金：
新加坡国家研究基金会;
关键词：
Oxide dispersion; Laser beam melting; Agglomeration; Argon; MICROSTRUCTURE; TEMPERATURE; NANOCLUSTERS; MECHANISMS; PARTICLES;
D O I：
10.1016/j.jallcom.2015.08.273
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The microstructural stability of Y-Ti-O nanoparticles during spot laser beam melting of oxide dispersion-strengthened steel powder is investigated. After the spot laser beam melting, Y2Ti2O7 oxide nanoparticles are successfully retained without dissolution or transformation. However, their particle size is considerably coarser than typical Y2Ti2O7 nanoparticles due to the active agglomeration of the Y-Ti-O nanoparticles, Cr-carbides, and Ar bubbles. In particular, an unexpectedly large volume of Ar bubbles embedded or attached to the Y2Ti2O7 nanoparticles is observed. The Ar gas bubbles seem to accelerate the particle agglomeration. No other phase is observed than Y2Ti2O7 oxide, Cr-carbide and Ar bubble in the sample. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：528 / 533
页数：6
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