TY - JOUR
T1 - Effect of Indenter Elastic Modulus on Hertzian Ring Crack Initiation in Silicon Carbide
AU - Wereszczak, Andrew A
AU - Daloz, William L
AU - Strong, Kevin T
AU - Jadaan, Osama M.
N1 - The U.S. Department of Energy's Office of Scientific and Technical Information
PY - 2011/1/1
Y1 - 2011/1/1
N2 - Hertzian ring cracking in two SiCs was studied as a function of elastic property mismatch between indenter and target. Ring crack initiation forces (RCIF) were measured using ZrO2, steel, Si3N4, Al2O3, and WC balls. The SiCs were similar; however, ∼20% of the grains in one were larger than the largest grains in the other. Decreasing indenter stiffness resulted in lower RCIFs and initiation occurred at lower forces in the SiC containing larger grains. Using a spherical indenter with similar elastic properties as the target provides a simpler interpretation and useful and confident estimates of ring crack initiation stresses.
AB - Hertzian ring cracking in two SiCs was studied as a function of elastic property mismatch between indenter and target. Ring crack initiation forces (RCIF) were measured using ZrO2, steel, Si3N4, Al2O3, and WC balls. The SiCs were similar; however, ∼20% of the grains in one were larger than the largest grains in the other. Decreasing indenter stiffness resulted in lower RCIFs and initiation occurred at lower forces in the SiC containing larger grains. Using a spherical indenter with similar elastic properties as the target provides a simpler interpretation and useful and confident estimates of ring crack initiation stresses.
UR - http://www.osti.gov/scitech/biblio/1024227
U2 - 10.1111/j.1744-7402.2010.02522.x
DO - 10.1111/j.1744-7402.2010.02522.x
M3 - Article
SN - 1551-2916
VL - 8
SP - 885
EP - 894
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
ER -