期刊
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
卷 528, 期 6, 页码 2635-2640出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2010.12.039
关键词
Cr2AlC; M(n+1)AX(n); Delamination; Kink band; Mechanical properties
类别
资金
- National Natural Science Foundation of China [90816005]
High-purity and dense Cr2AlC has been successfully fabricated by hot-pressing, using Cr, Al and graphite as raw materials. Delamination, kink bands, monolamellar kink, transgranular crack and transgranular fracture of bulk Cr2AlC are found during the room-temperature test. The density, Vickers hardness, flexural strength, Young's modulus, compressive strength and fracture toughness of the Cr2AlC are 5.17 g/cm(3). 4.9 GPa, 469 +/- 27 MPa, 282 GPa, 949 +/- 22 MPa and 6.22 +/- 0.26 MPa m(1/2), respectively. The strength of Cr2AlC could be greatly improved by second phase of Cr7C3. And the slipping of basal planes and slip system cold be hindered by Cr7C3, thus resulting in a lower toughness. (C) 2011 Elsevier B.V. All rights reserved.
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