Preparation and High-temperature Oxidation Behavior of High Purity Ta2AlC Ceramics Prepared by Spark Plasma Sintering

被引：0

作者：

Hu C. ^{[1
]}

Ying G. ^{[1
]}

Liu L. ^{[1
]}

Sun C. ^{[1
]}

Wen D. ^{[2
]}

Zhang J. ^{[1
]}

Zhang C. ^{[1
]}

Wang X. ^{[2
]}

Wang C. ^{[1
]}

机构：

[1] College of Mechanics and Materials, Hohai University, Nanjing

[2] Key Laboratory of Superlight Materials & Surface Technology of Ministry of Education, Harbin Engineering University, Harbin

来源：

Cailiao Daobao/Materials Reports | 2021年 / 35卷 / 12期

基金：

中国国家自然科学基金;

关键词：

Mechanical property; Oxidation behavior; Spark plasma sintering; Ta[!sub]2[!/sub]AlC;

D O I：

10.11896/cldb.21010065

中图分类号：

学科分类号：

摘要：

High purity and bulk Ta2AlC ceramics had been synthesized by self-propagating high-temperature synthesis, pressure-less sintering and spark plasma sintering, using Ta, Al and carbon black powders as raw materials. Microstructures and properties of the as-fabricated Ta2AlC ceramics were investigated. The Vickers hardness, flexural strength and fracture toughness of the as-fabricated bulk Ta2AlC ceramics are 5.6 GPa, 510 MPa and 6.16 MPa•m1/2, respectively. The fast heating rate, short sintering time and fine grain formation in the spark plasma sintering resulted in a fine-grain strengthening effect which led to the high hardness and strength. The Ta2AlC ceramics oxidized at the temperature range of 700-900 ℃ showed a linear oxidation kinetics trend. When the Ta2AlC ceramic was oxidized at 700 ℃ for 15 h, the oxidation layer of the Ta2AlC was mainly composed of Ta2O5. And the oxidation products would become Ta2O5 and AlTaO4 while the oxidation temperature was risen up to 800-900℃. © 2021, Materials Review Magazine. All right reserved.

引用

页码：12044 / 12048

页数：4

共 30 条

[1] Sokol M, Natu V, Kota S, Et al., Trends in Chemistry, 1, 2, (2019)
[2] Barsoum M W, Radovic M., Annual Review of Materials Research, 41, (2011)
[3] Barsoum M W, El-Raghy T., American Scientist, 89, (2001)
[4] Sokol M, Kalabukhov S, Zaretsky E, Et al., Physical Review Materials, 3, 6, (2019)
[5] Sun Z M., International Materials Reviews, 56, 3, (2011)
[6] Zhu Y Y, Zhou A G, Zan Q F, Et al., Materials Reports A: Review Papers, 28, 9, (2014)
[7] Liu Y, Zhang J B, Li Y, Et al., Materials Reports, 29, S2, (2015)
[8] Xiao L, Li S, Song G, Et al., Journal of the European Ceramic Society, 31, 8, (2011)
[9] Zheng L Y, Zhou Y C, Feng Z H., Aerospace Materials and Technology, 43, 6, (2013)
[10] Zhao Z L, Feng X M, Ai T T., Bulletin of the Chinese Ceramic Society, 30, 1, (2011)

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