Oxidation Resistance of In Situ Reaction/Hot Pressing Synthesized Ti2AlC-20% TiB2 Composite at 600-900 °C in Air

被引：1

作者：

Wang, Wenting ^{[1
,2
]}

Xu, Jingjun ^{[1
]}

Zuo, Jun ^{[1
]}

Ma, Ke ^{[1
]}

Li, Yang ^{[1
,2
]}

He, Guangqi ^{[1
]}

Li, Meishuan ^{[1
]}

机构：

[1] Chinese Acad Sci, Shengyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China

[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China

来源：

ACTA METALLURGICA SINICA-ENGLISH LETTERS | 2024年 / 37卷 / 04期

基金：

中国国家自然科学基金;

关键词：

MAX phase; Ti2AlC-TiB2; composite; Intermediate temperature oxidation; Oxidation kinetics; HIGH-TEMPERATURE OXIDATION; MECHANICAL-PROPERTIES; RAMAN-SPECTRUM; MAX PHASES; TI2ALC; BEHAVIOR; ANATASE; MICROSTRUCTURE; DEPOSITION; COATINGS;

D O I：

10.1007/s40195-023-01647-z

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The oxidation behavior and kinetics of Ti2AlC-20vol.%TiB2 composite at 600-900 degrees C in air were investigated. The results showed that the oxidation kinetics of the composite followed a logarithmic law within the given temperature range, which indicated that the composites had excellent oxidation resistance. The selective oxidation of Al in Ti2AlC was greatly enhanced, which facilitated the formation of a continuous and dense protective layer of Al2O3. Meanwhile, the existence of molten B2O3 inhibited the outward diffusion of Ti and inward diffusion of oxygen, which prevented the growth of anatase TiO2 at 600 degrees C and rutile TiO2 at 700-900 degrees C. Therefore, the incorporation of TiB2 completely inhibited the abnormally rapid oxidation of bulk Ti2AlC at 600 degrees C and improved its oxidation resistance at 700-900 degrees C.

引用

页码：739 / 748

页数：10

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