THERMAL SHOCK BEHAVIOR OF ZrB2-20vol.％ SiC-15vol.％ GRAPHITE FLAKE BY HOT PRESSING
The thermal shock behavior of hot-pressed ZrB2-SiC composite containing 15vol.％ graphite flake (ZrB2-SiC-G) was investigated. The thermal shock testing was carried out by means of quenching into water from high temperatures (ΔT in the range of 200-1000℃). The damage introduced by the thermal shock was characterized by the degradation of bending strength. The residual strength exhibited a complex evolution and could be divided into three zones according to the variation of the temperature difference: (i) no damage zone (200-300℃), (ii) strength degradation zone (300-400℃), and (iii) low stable strength zone (400-1000℃). The minimum residual strength of 160 MPa, higher than 40％ of the initial strength of 396 MPa, was obtained in the third zone of temperature difference. The surface feature of ZrB2-SiC-G composite after the thermal shock tests was also investigated.
UHTC thermal shock resistance residual strength microstructure
XINGHONG ZHANG ZHI WANG XIN SUN WENBO HAN CHANGQING HONG
Center for Composite Materials, Harbin Institute of Technology, Yikuang Street, Harbin 150001, Peoples Republic of China
国际会议
第五届先进材料与加工国际会议(Fifth International Conference on Advanced Materials and Processing ICAMP-5)
哈尔滨
英文
1160-1165
2008-09-03（万方平台首次上网日期，不代表论文的发表时间）