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|標題:||Transient liquid phase bonding of alumina to alumina via boron oxide interlayer||作者:||Chang, L.S.
|關鍵字:||joining;Al2O3;B2O3;transient liquid phase bonding;ceramics||Project:||Ceramics International||期刊/報告no：:||Ceramics International, Volume 30, Issue 8, Page(s) 2121-2127.||摘要:||
Alumina bulks coated with 3 mum boron oxide layer were bonded at various temperatures and times in air. The joining strength, interfacial compounds and morphologies of cross-sections and fracture surfaces were investigated by means of four-point bending, X-ray diffraction and scanning electron microscopy. The maximum bending strength is 71 MPa for alumina bonded at 800degreesC for 15 h. The layered metastable phase of 3Al(2)O(3)-B3O3 forms at the beginning of joining at temperature above 700 degreesC. This interlayer transforms into a whisker structure consisting of 2Al(2)O(3)-B3O3 and 9Al(2)O(3)-2B(3)O(3) With increasing temperature and time. Models for the growth and morphology of these interfacial compounds are proposed. (C) 2004 Elsevier Ltd and Techna S.r.l. All rights reserved.
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