期刊
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
卷 28, 期 5, 页码 587-592出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrmhm.2010.04.006
关键词
W/ZrC composite; W/Cu composite; Pressure sintering; Mechanical property; Ablation resistance
In this study the W/Cu and W/ZrC composites have been fabricated by hot-press and then their mechanical properties were compared in addition to their ablation resistance. To produce W-20vol.%Cu composite at first stage the elemental W and Cu powders were ball milled for 3 h in rotation speed of 200 rpm, in which 2% nickel was added in order to reduce the density. The mixed powders were hot-pressed for 1 h at 1400 degrees C and compact pressure of 30 MPa. Additionally W/40vol.%ZrC composite has been fabricated by hot-pressing of mixed W and ZrC powders in 30 MPa and 2200 degrees C for 1 h. Since these materials are used at elevated temperature applications, where ablation is the main source of material failure, after producing the composites their ablation resistance was evaluated in a real condition. The results show that not only W-ZrC composite is better than W-Cu composite in mechanical properties, but also in ablation resistance. (C) 2010 Elsevier Ltd. All rights reserved.
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