Enhancement of creep resistance of pure magnesium by magnesiothermic reaction with TiO2 nanoparticles

被引：6

作者：

Kang, H. ^{[1
]}

Choi, K. M. ^{[2
]}

Bae, D. H. ^{[2
]}

机构：

[1] Kookmin Univ, Sch Adv Mat Engn, Seoul 02707, South Korea

[2] Yonsei Univ, Dept Mat Sci & Engn, 50 Yonsei ro Seodaemungu, Seoul 03722, South Korea

来源：

MATERIALS LETTERS | 2022年 / 324卷

基金：

新加坡国家研究基金会;

关键词：

Magnesium; Magnesiothermic reaction; Creep strength; Nanoparticle; Coble creep; MICROSTRUCTURE; ALLOYS; BEHAVIOR;

D O I：

10.1016/j.matlet.2022.132583

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The creep resistance of magnesium used in powertrain components of automotive is one of the most considerable mechanical properties. The metallic oxide particles using a magnesiothermic reaction in the Mg matrix can effectively improve the creep resistance. The MgO nanoparticles produced by oxygen atoms decomposed from embedded TiO2 nanoparticles in the Mg matrix effect on the creep resistance is investigated. The magnesium revealed a stress exponent close to 1, which indicates that the dominant creep may occur via lattice diffusion, as well as the nanoparticles formed at the grain boundaries during creep deformation suppress Coble creep even when relatively high stresses (30-70 MPa) are applied at low temperatures (70-150 ?).

引用

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