期刊
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
卷 29, 期 3, 页码 401-404出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrmhm.2011.01.005
关键词
ZrB2; ZrC; Zr matrix composites; Short fiber; Microstructure
资金
- National Natural Science Foundation of China [50761003, 50601006]
- Construction Plan of Top-Notch Innovative Teams in Guangxi University
- Opening Foundation of State Key Laboratory of Metastable Materials Science and Technology [201005]
In the present work, novel zirconium matrix composites reinforced with ZrB2 or (ZrB2 + ZrC) hybrid short fibers were designed and prepared for the first time, through the reaction from Zr, B and B4C with non-consumable vacuum arc melting. The result shows that the ZrB2 particles grow in large short-fiber shape while the ZrC particles grow in thin short-fiber shape or near equiaxed shape. The morphological characters are related to their crystal structure and growth mechanism. Homogeneous distribution of both two in situ reinforcements can be found in the as-cast composites. As both the Zr matrix and the in situ reinforcements have good nuclear and mechanical properties, these Zr matrix composites are considered to be good candidates for applied as reactor core components. (C) 2011 Elsevier Ltd. All rights reserved.
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