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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 18    No. 1    January 2008

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Synthesis of high-purity Ti2AlN ceramic by hot pressing
YAN Ming(严 明)1, CHEN Yan-lin(陈艳林)1, MEI Bing-chu(梅炳初)2, ZHU Jiao-qun(朱教群)2

1. College of Chemistry and Environmental Engineering, Hubei University of Technology, Wuhan 430068, China;2. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology, Wuhan 430070, China

Abstract:High-purity Ti2AlN ceramic was prepared at 1300 ℃ by hot pressing(HP) of Ti/Al/TiN powders in stoichiometric proportion. The sintered product was characterized using X-ray diffraction(XRD) and MDI Jade 5.0 software (Materials Data Inc, Liverpool, CA). Scanning electron microscopy(SEM) and electron probe micro-analysis(EPMA) coupled with energy-dispersive spectroscopy(EDS) were utilized to investigate the morphology characteristics. The results show that Ti2AlN phase is well-developed with a close and lamellar structure. The grains are plate-like with the size of 3−5 μm, thickness of 8−10 μm and elongated dimension. The density of Ti2AlN is measured to be 4.22 g/cm3, which reaches 97.9% of its theory value. The distribution of Ti2AlN grains is homogeneous.

 

Key words: Ti2AlN; synthesis method; microstructure; hot pressing; sintering

ISSN 1672-7029
CN 43-1423/U

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