Evolution of Indentation Induced Cracks on WC Ceramic under Cavitation Loading in Water

CORC > 兰州化学物理研究所 > 中国科学院兰州化学物理研究所 > 先进润滑与防护材料研究发展中心

	Evolution of Indentation Induced Cracks on WC Ceramic under Cavitation Loading in Water
	Han JS(韩杰胜); Lv JJ(吕晋军); Meng JH(孟军虎); Lv JJ(吕晋军)
	2014
会议名称	第八届先进陶瓷国际研讨会
会议日期	2013-11-4至2013-11-7
会议地点	中国重庆
关键词	WC indentation crack cavitation erosion
页码	548-551
通讯作者	吕晋军
中文摘要	For engineering ceramics, cracks produced in preparation process, i.e. sintering and surface finishing, have a profound impact on the mechanical strength and wear. Under cavitation loading, the flaws on the surface and subsurface are preferentially eroded. In this paper, artificial cracks are introduced on WC ceramic by indentation of a Vickers indenter at a load of 10 kgf. Five positions on the cavitation eroded area are selected. The average length of the cracks is 71.6 μm. The cavitation erosion tests are terminated at 1, 3, and 5 min to reveal the evolution of cracks. A single pattern for the evolution of cracks is recognized. Two new cracks at the tip of indentation cracks first nucleate and then propagate (accompanied by pullout of grains). The angle between the two new cracks ranges from 30° to 45°. The evolution of adjunct two groups of cracks gives birth to local breakout finally. Steps provided limited resistance to breakout are observed. The nucleation and propagation of the four indentation cracks do not always occur simultaneously.
收录类别	EI
会议主办者	清华大学
会议录	Key Engineering Materials Vols 602-603
会议录出版者	Trans Tech Publications, Switzerland
学科主题	材料科学与物理化学
语种	英语
内容类型	会议论文
源URL	[http://210.77.64.217/handle/362003/7067]
专题	兰州化学物理研究所_先进润滑与防护材料研究发展中心兰州化学物理研究所_固体润滑国家重点实验室
通讯作者	Lv JJ(吕晋军)
推荐引用方式 GB/T 7714	Han JS,Lv JJ,Meng JH,et al. Evolution of Indentation Induced Cracks on WC Ceramic under Cavitation Loading in Water[C]. 见:第八届先进陶瓷国际研讨会. 中国重庆. 2013-11-4至2013-11-7.