Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/90221
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Type: Journal article
Title: Scratch damage in ceramics: role of microstructure
Author: Xie, Z.H.
Hoffman, M.
Moon, R.J.
Munroe, P.
Cheng, Y.B.
Citation: Journal of the American Ceramic Society, 2003; 86(1):141-148
Publisher: Wiley
Issue Date: 2003
ISSN: 0002-7820
1551-2916
Statement of
Responsibility: 
Zong-Han Xie, Mark Hoffman, Robert J. Moon, and Paul Munroe, Yi-Bing Cheng
Abstract: Scratch tests were conducted using a standard pyramid indenter against ╬▒-SiAlON ceramics with different microstructures: (i) fine equiaxed grains and (ii) large elongated grains. The formation and propagation of cracks were investigated via focused ion-beam milling, with an emphasis on the effect of microstructure on material removal. The fine equiaxed microstructure exhibited high resistance to material removal at low loads, because of its high hardness and homogeneous structure. As the load increased, radial and lateral cracks developed, resulting in large-scale chipping. In contrast, the large elongated microstructure showed a propensity to form microcracks and microabrasion, which is characteristic of partial grain removal, at low loads. With increasing loads, however, the large elongated grains suppressed the propagation of radial and lateral cracks, and, consequently, no large-scale chipping occurred. Implications for material design in abrasive-wear conditions have been discussed.
Keywords: indentation; abrasion/abrasives; SiAlON
Rights: Copyright status unknown
RMID: 0030024216
DOI: 10.1111/j.1151-2916.2003.tb03291.x
Appears in Collections:Mechanical Engineering publications

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