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Round‐robin exercise on the three‐ and four‐point flexural strength of thin ceramic plates for power modules
Author(s) -
Miyazaki Hiroyuki,
Hirao Kiyoshi,
Hyuga Hideki
Publication year - 2019
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.13339
Subject(s) - flexural strength , materials science , three point flexural test , bending , composite material , fixture , ceramic , round robin test , test fixture , mathematics , mechanical engineering , engineering , statistics
Round‐robin exercises on three‐ and four‐point flexural tests were successfully conducted to evaluate the fracture strength of Si 3 N 4 , Al 2 O 3 , and AlN thin plates for power modules. A 0.64 mm × 12 mm × 40 mm test specimen was loaded in three‐point flexure with a major span of 30 mm or was loaded in four‐point flexure with a major/minor span of 30/10 mm. For a 0.32 mm × 12 mm × 20 mm test specimen, both major and minor spans were halved. All test specimens were loaded in a fully articulated fixture provided by the test organizer. Reasonable consistencies in the resultant flexural strength were obtained between laboratories, indicating our new test condition for three‐ and four‐point bending of thin ceramic plates is satisfactory for reliable measurement of the flexural strength.