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Crack Repairing in Alumina by Penetrating Glass
Author(s) -
Chu MinCheol,
Cho SeongJai,
Yoon KyungJin,
Park HyunMin
Publication year - 2005
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2005.00086.x
Subject(s) - borosilicate glass , materials science , flexural strength , composite material , residual stress , aluminium oxides , chemistry , biochemistry , catalysis
Through‐the‐thickness cracks with the depth of about 2.5 mm were introduced on the flexural specimens of alumina. Borosilicate glass was then penetrated into the cracks at 1500°C to repair them. Strength testing indicated that the cracks, once repaired, became even stronger than mother material alumina. The reason of the strengthening was discussed in terms of residual stress and the rebonding of alumina grains on crack surfaces. This investigation implies that cracks in alumina can be repaired by simply penetrating glass into them.