期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 623, 期 -, 页码 282-289出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2014.10.128
关键词
Metal matrix composites; Mechanical alloying; Mechanical properties; Microstructure; Transmission electron microscopy, TEM
资金
- Defense Acquisition Program Agency (DAPA)
- Agency for Defense Development (ADD) of Korea [ADD-09-01-07-18]
- National Research Council of Science & Technology (NST), Republic of Korea [FR15510] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The microstructures and properties of W-ZrC composites prepared in situ were compared with those of conventionally prepared W-ZrC and W-(Zr, W) C. In situ preparation led to an ultrafine microstructure with a homogeneous dispersion of ZrC, while the other composites showed microstructures similar to each other. The composite of W containing 30 vol.% (Zr-0.88 W-0.12) C showed an excellent flexural strength of similar to 1425 MPa at 1000 degrees C. It also showed an excellent flexural strain of 0.051 at 1400 degrees C, which was obtained by using a maximum displacement of 2.41 mm. Those values have never been reported previously. A similar W composite, in situ W-10 vol.% ZrC, demonstrated a flexural strength of 1324 MPa and a displacement of 0.9 mm under similar conditions. The results of this study are discussed in terms of microstructure and phase stability. (C) 2014 Elsevier B.V. All rights reserved.
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