Experimental investigation and thermodynamic modeling of Hf-Si-B system

被引：11

作者：

Cai, G. M. ^{[1
,3
]}

Zheng, F. ^{[1
,3
]}

Yi, D. Q. ^{[1
,3
]}

Chen, H. M. ^{[1
]}

Zhou, S. X. ^{[1
]}

Long, Z. H. ^{[1
]}

Jin, Z. P. ^{[1
,2
,3
]}

机构：

[1] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China

[2] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

[3] Cent S Univ, Ctr Phase Diagram & Mat Design & Manufacture, Changsha 410083, Hunan, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 494卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

Ceramics; Intermetallics; Crystal structure; Phase diagrams; Thermodynamic modeling; X-ray diffraction; TERNARY-SYSTEM;

D O I：

10.1016/j.jallcom.2010.01.050

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Microstructure and phase equilibria of selected alloys of Hf-Si-B system have been studied in annealed conditions mainly by means of X-ray powder diffraction with aid of scanning electron microscope analysis. Compound Hf(5)Si(3)B(0.2) taking hexagonal structure (space group P6(3)/mcm), was confirmed with each unit cell containing two formulas and having lattice parameters a = 7.8557(1) angstrom and c= 5.52622(1) angstrom. Its crystal structure is made up of regular BHf(6) and HfSi(6) octahedra connected each other along <0 0 1- 1> direction by sharing common faces. This features a three-dimensional framework which is similar to that of analogue Mn(5)Si(3) structure. Besides, a thermodynamic description of Hf-Si-B system was developed based on its constituent binary systems and ternary experimental data from literatures and this work. Isothermal sections at 1273 K and 1573 K were calculated from our newly assessed thermodynamic description with comparison of experimental data. (c) 2010 Elsevier B.V. All rights reserved.

引用

页码：148 / 154

页数：7

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