A Microscopical Investigation of the Interface Between Borosilicate Glass and Fe-Ni-Co Alloy Joined by Direct Fusion of Glass to Metal
Torranin Chairuangsri*[a], Manat Jaimasith [a], Worapong Thiemsorn [a] and John T.H. Pearce [b] and John T. H. Pearce [b]* Author for corresponding; e-mail address: torra@chmai.loxinfo.co.th
Volume: Vol.29 No.1 (APRIL 2002)
Research Article
DOI:
Received: 17 December 2001, Revised: -, Accepted: 1 March 2002, Published: -
Citation: Chairuangsri T., Jaimasith M., Thiemsorn W. and Pearce J.T.P. .J.T.H., A Microscopical Investigation of the Interface Between Borosilicate Glass and Fe-Ni-Co Alloy Joined by Direct Fusion of Glass to Metal , Chiang Mai Journal of Science, 2002; 29(1): 15-19.
Abstract
Interfaces between a borosilicate glass and a Fe-Ni-Co alloy joined by direct fusion of glass to metal were studied by using scanning electron microscopy and energy dispersive X-ray microanalysis to examine interfacial characteristics and the mechanism of adhesion. Both chemical and mechanical bondings were found to contribute to adhesion. Migration of Fe into the glass phase and penetration of glass into the alloy causing mechanical interlock were observed in the case of joining without pre-oxidation of the alloy surface. Where the alloy surface was pre-oxidised, an oxide layer and migration of Fe and Co into the glass phase were found. For the case of no pre-oxidation, the alloy acted as a sink for site vacancies, but when the alloy was pre-oxidised, then the sink was in the oxide layer.