Morphological and structural evolutions of tungsten-tungsten oxide powders after a novel vacuum-reduction thermo-chemical treatment

被引：5

作者：

Ahangarkani, M. ^{[1
]}

机构：

[1] Malek Ashtar Univ Technol, Fac Mat & Fabricat, Tehran, Iran

来源：

MATERIALS LETTERS | 2023年 / 339卷

关键词：

Tungsten; Microstructure; Oxidation; Vacuum heat treatment; Hydrogen reduction; HYDROGEN; MICROSTRUCTURE; SIZE;

D O I：

10.1016/j.matlet.2023.134102

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In the current paper, morphological, chemical and structural evolution of WO3 particles under an interesting thermo-chemical treatment was investigated. This proposed treatment is consisting of partial oxidation of initial tungsten particles at 800 degrees C under air atmosphere, vacuum heat treatment at 1100 degrees C and hydrogen reduction at 800 degrees C, subsequently. The morphological and microstructural investigations of the material during different stages carried out by SEM and EDS analysis. The obtained results confirmed the sever size reduction of initial tungsten powders due to the formation of needle-like tungsten oxide particles after vacuum heat treatment. Formation of cauliflower-like tungsten oxide, the phase transformation from yellow tungsten oxide into brown one after vacuum treatment, and growth of tungsten crystal cluster during hydrogen reduction is the main microstructural observation in this study.

引用

页数：4

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