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Determination of the thermal properties of AlB2-type WB2
C. L. Jiang; Z. L. Pei; Y. M. Liu; H. Lei; J. Gong; C. Sun
2013
Source PublicationApplied Surface Science
ISSN0169-4332
Volume288Pages:324-330
AbstractThermal expansion coefficient of AlB2-type WB2 was investigated using in-situ x-ray diffraction (XRD) measurements and quasi-harmonic Debye approximation combined with density functional theory (DFT) calculations. The calculated average volumetric thermal expansion coefficient 24.86 x 10(-6) K-1 agrees with the experimental value 21.52 x 10(-6) K-1 in the temperature range of 298 K to 473 K. Different linear thermal expansion coefficients along the a (6.04 x 10(-6) K-1) and c (9.39 x 10(-6) K-1) directions have been found experimentally. This anisotropic behavior is attributed to the different bonding characteristics along the two directions. A Lindemann-like melting rule has been found for AlB2-type MB2 (M = Ti, Zr, V, Nb, Ta, Cr, Mo and Mn), and the melting point of AlB2-type WB2 has been estimated about 2833.80 +/- 18.4 K according to this rule. Furthermore, the temperature and pressure dependence of thermal expansion and heat capacity is also studied. To our knowledge, it is the first time to investigate the thermal properties of AlB2-type WB2. (C) 2013 Elsevier B.V. All rights reserved.
description.department[jiang, c. l. ; pei, z. l. ; liu, y. m. ; lei, h. ; gong, j. ; sun, c.] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china. ; sun, c (reprint author), chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china. ; csun@imr.ac.cn
KeywordAlb2-type Wb2 In-situ X-ray Diffraction Quasi-harmonic Debye Approximation Thermal Expansion Melting Point Heat Capacity Superhard Rhenium Diboride Tungsten Tetraboride Borides Approximation Stability Crystals Model State
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71280
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
C. L. Jiang,Z. L. Pei,Y. M. Liu,et al. Determination of the thermal properties of AlB2-type WB2[J]. Applied Surface Science,2013,288:324-330.
APA C. L. Jiang,Z. L. Pei,Y. M. Liu,H. Lei,J. Gong,&C. Sun.(2013).Determination of the thermal properties of AlB2-type WB2.Applied Surface Science,288,324-330.
MLA C. L. Jiang,et al."Determination of the thermal properties of AlB2-type WB2".Applied Surface Science 288(2013):324-330.
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