Effect of Cr particle size on the development of a chromia scale on Ni-Cr composites

被引：8

作者：

Dong, Zhihong ^{[1
]}

Xie, Yun ^{[2
]}

Peng, Xiao ^{[1
,2
,3
]}

机构：

[1] Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China

[2] Nanchang Hangkong Univ, Sch Mat Sci & Engn, 696 Fenghenan Ave, Nanchang 330063, Jiangxi, Peoples R China

[3] Nanchang Hangkong Univ, Jiangxi Prov Engn Res Ctr Surface Technol Aeronau, 696 Fenghenan Ave, Nanchang 330063, Jiangxi, Peoples R China

来源：

CORROSION SCIENCE | 2022年 / 194卷

基金：

中国国家自然科学基金;

关键词：

A; metal matrix composites; B; SEM; TEM; XPS; C; selective oxidation; OXIDATION; CORROSION; COATINGS; NANOCRYSTALLIZATION; NANOCOMPOSITE; RESISTANCE; GROWTH;

D O I：

10.1016/j.corsci.2021.109915

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The nanocystalline Ni-base composites dispersing Cr particles in different size range were deliberately fabricated. It showed that the Cr content for chromia scale formation at 900 degrees C decreased from above 20 wt% required by the microparticle (-4 pm in size) dispersed composite to much lower values of 13 wt% and 7.8 wt% required by the composites dispersing submicron- (-0.8 pm) and nanoparticles (-25 nm), respectively. The particle size effect on oxidation, primarily resulting from the finer Cr dispersions which favor more ubiquitous chromia nucleation when oxidation starts, offers a guideline for designing and manufacturing low-Cr containing but oxidation-resistant alloys.

引用

页数：10

共 21 条

[1] Superior high-temperature oxidation resistance of nanocrystalline 304 austenitic stainless steel containing a small amount of Si [J].