中國有色金屬學(xué)報(bào)(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 7 No. 3 September 1997 |
FRACTURE MODE AND PROCESS OF SiCw+B4Cp/MB15 MAGNESIUM MATRIX COMPOSITE
Su Ying; Zhang Guoding; Wang Huimin; Zhang Di; Qin Jining
（State Key Lab of MMC; Shanghai Jiao Tong University; Shanghai 200030）
Abstract:The mechanical properties of the SiC w+B4Cp/MB15 extruded composite made by liquid infiltration technique were tested. It is concluded that the strength and E modulus of the composite are much higher than those of its matrix alloy by analysing its fracture appearance and fracture process observed with SEM; the fracture mode is the combination of cleavage and fibrous mode; cracks pass through whiskers in the fracture process which can be divided into three stages: void initiation, second critical elongation and crack buckling expansion.
Key words: magnesium composites SiC whiskers B4C particles fracture
