Preparation of fine-grained MoAlB with preferable mechanical properties and oxidation resistance

被引：34

作者：

Gong, Yichao ^{[1
]}

Guo, Bodi ^{[1
]}

Wang, Xu ^{[1
]}

Ye, Wenbo ^{[1
]}

Li, Rui ^{[1
]}

Chen, Xuan ^{[1
]}

Wang, Juan ^{[1
]}

Zhang, Guojun ^{[1
]}

机构：

[1] Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Peoples R China

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2020年 / 93卷 / 93期

基金：

中国国家自然科学基金;

关键词：

MoAlB; Fine-grain; Mechanical alloying; Mechanical property; Oxidation resistance; MICROSTRUCTURE; MO;

D O I：

10.1016/j.ijrmhm.2020.105345

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

MoAlB has promising aeronautic and high-temperature applications due to its excellent mechanical property, favorable thermal conductivity and fantastic high temperature oxidation resistance etc. In this work, in order to obtain MoAlB with preferable properties, the fine-grained MoAlB ceramics were prepared by proprietary mechanical alloying and hot-pressing sintering technology. The microstructure observation showed that MoAlB with a small grain size of 1.26 mu m could be obtained when the molar ratio of Mo, Al and B was 1:1.3:1 and the sintering temperature was 1300 degrees C. The testing results indicated that the as-prepared MoAlB ceramic showed better comprehensive mechanical properties compared with the reported results. The compressive strength, hardness, flexural strength and fracture toughness are 2420 MPa, 15.46 GPa, 382.87 MPa and 7.1 MPa.m(1/2), respectively. It also exhibited favorable high temperature oxidation resistance due to the rapid formation of alumina scales. These results can cast light for future development of ultrahigh-temperature ceramics.

引用

页数：8

共 31 条

[1] Theoretical investigation of structural, elastic, and electronic properties of ternary boride MoAlB [J].

Ali, M. A. ;

Hadi, M. A. ;

Hossain, M. M. ;

Naqib, S. H. ;

Islam, A. K. M. A. .

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 2017, 254 (07)

[2] Density functional theory insights into ternary layered boride MoAlB [J].

Bai, Yuelei ;

Qi, Xinxin ;

Duff, Andrew ;

Li, Ning ;

Kong, Fanyu ;

He, Xiaodong ;

Wang, Rongguo ;

Lee, Wiliam Edward .

ACTA MATERIALIA, 2017, 132 :69-81

[3] Compressive deformation of MoAIB up to 1100 °C [J].

Chen, Yexiao ;

Kota, Sankalp ;

Barsoum, Michel W. ;

Radovic, Miladin .

JOURNAL OF ALLOYS AND COMPOUNDS, 2019, 774 :1216-1222

[4] First-principles investigation on the chemical bonding, elastic properties and ideal strengths of MoAlB and WAlB nanolaminated MAB phases [J].

Dai, Fu-Zhi ;

Feng, Zhihai ;

Zhou, Yanchun .

COMPUTATIONAL MATERIALS SCIENCE, 2018, 147 :331-337

[5] Molten salt shielded synthesis of oxidation prone materials in air [J].

Dash, Apurv ;

Vassen, Robert ;

Guillon, Olivier ;

Gonzalez-Julian, Jesus .

NATURE MATERIALS, 2019, 18 (05) :465-+

[6]

Frommeyer G., 1983, Physical metallurgy. Third revised and enlarged edition, P1853

[7] Microstructure and mechanical and thermal properties of ternary carbides in Hf-Al-C system [J].

He, L. F. ;

Bao, Y. W. ;

Wang, J. Y. ;

Li, M. S. ;

Zhou, Y. C. .

ACTA MATERIALIA, 2009, 57 (09) :2765-2774

[8] AMORPHIZATION OF TRANSITION-METAL ZR ALLOYS BY MECHANICAL ALLOYING [J].

HELLSTERN, E ;

SCHULTZ, L .

APPLIED PHYSICS LETTERS, 1986, 48 (02) :124-126

[9] Powder Metallurgy Strategies to Improve Properties and Processing of Titanium Alloys: A Review [J].

Hidalgo, Alexandra Amherd ;

Frykholm, Robert ;

Ebel, Thomas ;

Pyczak, Florian .

ADVANCED ENGINEERING MATERIALS, 2017, 19 (06)

[10]

Hu GX., 2010, Fundamentals of Materials Science, V3

← 1 2 3 4 →