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Oxidation behaviour of titanium-containing brazing filler metals.(Author abstract)

Moorhead, A. J. ; Kim, Hyoun - Ee

Journal of Materials Science, Jan, 1991, Vol.26(7), p.4067 [Tạp chí có phản biện]

ISSN: 0022-2461

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  • Nhan đề:
    Oxidation behaviour of titanium-containing brazing filler metals.(Author abstract)
  • Tác giả: Moorhead, A. J. ; Kim, Hyoun - Ee
  • Chủ đề: Metal Industries ; Oxidation-reduction Reactions
  • Là 1 phần của: Journal of Materials Science, Jan, 1991, Vol.26(7), p.4067
  • Mô tả: Byline: A. J. Moorhead (1), Hyoun-Ee Kim (1) Abstract: Brazements on alumina or partially stabilized zirconia (PSZ) of four silver- or copper-based brazing filler metals that contain titanium to promote wetting of and adherence to structural ceramics, were exposed in a thermogravimetric analyser at temperatures up to 700degC to atmospheres of 100% O.sub.2, Ar-20% O.sub.2 and Ar-3 p.p.m. O.sub.2. The alloys included Cu-41.1Ag-3.6Sn-7.2Ti, Ag-44.4Cu-8.4Sn-0.9Ti, Ag-41.6Cu-9.7Sn-5.0Ti and Ag-37.4Cu-10.8In-1,4Ti, at%. All formed external oxides that were more or less protective under all of the test conditions studied. The growth of the oxides followed a parabolic time law. The gains in weight due to oxidation observed were small, ranging (for 45 h exposure at 400 degC to Ar-20% O.sub.2) from 0.20 mgcm.sup.-2 for the Ag-37.4Cu-10.8In-1.4Ti alloy to 0.46 mgcm.sup.-2 for Cu-41.1Ag-3.6Sn-7.2Ti. As expected, weight gain increased with increasing temperature or {ie4067-01}. Unexpectedly, the titanium played a minor role in the scale formed on any of the filler metals with a titanium oxide, TiO.sub.2, being found on only one alloy -- Ag-41.6Cu-9.7Sn-5.0Ti. The brazements on PSZ gained weight at a higher rate than comparative brazements on alumina. We attribute this behaviour to oxygen transport through the zirconia resulting in the growth of an interfacial layer of titanium oxide. Author Affiliation: Article History: Registration Date: 14/10/2004 Received Date: 06/07/1989 Accepted Date: 23/10/1989
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0022-2461

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