Microstructural Characterization of Commercial Hot‐Pressed Boron Carbide Ceramics

Journal of the American Ceramic Society - Tập 88 Số 7 - Trang 1935-1942 - 2005
Mingwei Chen1,2,3, James W. McCauley4,5, Jerry C. LaSalvia4,5, Kevin J. Hemker2
1*Member, American Ceramic Society.
2Department of Mechanical Engineering, Johns Hopkins University, Baltimore, Maryland 21218
3Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
4Fellow, American Ceramic Society.
5U.S. Army Research Laboratory, Aberdeen Proving Ground, Maryland 21005

Tóm tắt

Two commercial hot‐pressed boron carbide ceramics were investigated by transmission electron microscopy. Atomic‐scale observations suggest that the grain boundaries of the two materials are free of grain‐boundary films. Two triple‐junction phases were found and characterized to be rhombohedral Fe2B103 and orthorhombic Ti3B4. In addition, intra‐granular precipitates, AlN, Mo2(C, B) and graphite, were identified and found to have coherent relationships with the boron carbide matrix. Micron‐scale inclusions were also observed and most of them were determined to be graphite. The formation mechanisms of the secondary phases and their possible influence on mechanical properties are also discussed.

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Tài liệu tham khảo

Lipp A., Boron Carbide, Production, Properties, Application, Techn. Rundschau, 14

10.1016/0955-2219(90)90048-K

10.1002/9780470294499.ch46

Dandekar D. P., 2001, Shock Response of Boron Carbide, ARL‐TR‐2456

E. D.Grady “Dynamic Properties of Ceramic Materials Sendia National Laboratories Report SAND 94‐3266”Sendia National Laboratories Albuquerque NM 1995.

10.1126/science.1080819

10.1111/j.1151-2916.1979.tb19042.x

10.1007/BF00791728

10.1023/A:1004888522607

10.1016/S0038-1098(00)00245-3

Marek E. V., 1975, Some Physical Properties of Boron Carbide with Vanadium and Chromium Additions, Sov. Powder Metall. Me. Ceram., 14, 54

10.1006/jssc.1997.7316

10.1002/9780470320280.ch65

10.1016/0022-5088(85)90444-8

10.1023/A:1006766910536

10.1016/S0955-2219(98)00071-5

10.1007/978-1-4757-5099-7

10.1021/ja01110a501

Niihara K., 1984, The Effect of Stoichiometry on Mechanical‐Properties of Boron‐Carbide, J. Am. Chem., Soc, c13

Leapman R., 1992, Transmission Electron Energy Loss Spectrometry in Materials Science

Singleton M. F., 1986, Binary Alloy Phase Diagrams

Upadhyaya G. S., 1996, Nature and Properties of Refractory Carbides

10.1111/j.1151-2916.1989.tb06290.x

10.1111/j.1151-2916.2000.tb01637.x

10.1023/A:1018625402103

10.1111/j.1151-2916.1989.tb06252.x

Villars P., 1997, Handbook of Ternary Phase Diagrams

Chiang Y. M., 1997, Physical Ceramics

10.1016/0022-5088(81)90195-8

10.1557/JMR.2000.0349

10.4028/www.scientific.net/KEM.206-213.811

10.1111/j.1151-2916.1995.tb08671.x

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Journal of the American Ceramic Society

Tập 88 Số 7

1935-1942

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