Paper Title:
Machining Cracks in Finished Ceramics
  Abstract

Grinding may create flaws that control strength and limit the performance of finished ceramics. Machining cracks sometimes have been difficult or impossible to find especially in toughened ceramics with interlocking grain microstructures that create rough fracture surfaces. Our fractographic examinations show that machining damage leaves telltale markings on fracture surfaces that may be easily detected using common fractographic techniques. A comprehensive study with over 400 ground rods and rectangular bars was conducted on several commercial silicon nitrides to study the effects of various machining conditions. Similarities and differences in behavior were observed. A paradoxical finding was that tougher silicon nitrides developed deeper grinding cracks. Machining crack size and shape strongly depended on the grinding wheel grit size.

  Info
Periodical
Edited by
J. Dusza, R. Danzer and R. Morrell
Pages
1-13
DOI
10.4028/www.scientific.net/KEM.290.1
Citation
G. D. Quinn, L. K. Ives, S. Jahanmir, "Machining Cracks in Finished Ceramics", Key Engineering Materials, Vol. 290, pp. 1-13, 2005
Online since
July 2005
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Bin Lin, Hong Tao Zhu, Hui Wu, Z.F. Wang, S.Y. Yu
Abstract:While be ground, ceramic is prone to engender surface/subsurface crack damage layer because of great grinding force and high brittle of the...
47
Authors: Jing Lin Tong, Bo Zhao, Yan Yan Yan
Abstract:Experimental research on grinding characteristics of nano-composites ceramics were carried out using diamond wheel in two-dimensional...
614
Authors: Josef Kasl
IV. Failure Analysis
Abstract:This contribution deals with the analysis of causes of a breakdown of a turbine rotor where stage 13 completely broke off. Microstructure and...
235
Authors: Pawel Figiel, Piotr Wyzga, Jolanta Laszkiewicz-Lukasik, Kamil Wojteczko, Marcin Podsiadlo
Abstract:Fracture toughness is one of the basic properties that determine the usefulness of these materials for structural applications. In this work,...
62