Microwave sintering of titanium

Luo, Shu Dong, Bettles, Colleen J., Yan, Ming, Schaffer, Graham B. and Qian, Ma (2010). Microwave sintering of titanium. In: M. Ashraf Imam and F.H. Froes, Symposium on Cost Affordable Titanium II. Symposium on Cost Affordable Titanium III held at the 2010 TMS Annual Meeting, Seattle, WA, U.S.A., (141-147). 14-18 February, 2010. doi:10.4028/www.scientific.net/KEM.436.141

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Author Luo, Shu Dong
Bettles, Colleen J.
Yan, Ming
Schaffer, Graham B.
Qian, Ma
Title of paper Microwave sintering of titanium
Conference name Symposium on Cost Affordable Titanium III held at the 2010 TMS Annual Meeting
Conference location Seattle, WA, U.S.A.
Conference dates 14-18 February, 2010
Proceedings title Symposium on Cost Affordable Titanium II   Check publisher's open access policy
Journal name Key Engineering Materials   Check publisher's open access policy
Place of Publication Stafa-Zuerich, Switzerland
Publisher Trans Tech Publications
Publication Year 2010
Sub-type Fully published paper
DOI 10.4028/www.scientific.net/KEM.436.141
ISBN 0878492763
ISSN 1013-9826
Editor M. Ashraf Imam
F.H. Froes
Volume 436
Start page 141
End page 147
Total pages 6
Collection year 2011
Language eng
Formatted Abstract/Summary
Effective sintering of titanium requires the use of a high sintering temperature (≥1200 °C), preferably in high vacuum (< 10-2 Pa). This confines the heating and cooling rates to ∼ 4 °C/min because of the limited thermal shock resistance of ceramic tube furnaces. Consequently, it leads to lengthy sintering cycles (10-12 hr). This work presents an assessment of microwave (MW) sintering of titanium. Titanium powders in the size ranges of <20 μm, 45-63 μm, and 100-150 μm were used to make green samples with compaction pressures ranging from 200-800 MPa. Sintering was carried out at 1200 °C for 2 hr in a 3 kW MW furnace with a 2.45 GHz multimode cavity under a vacuum of 2-6×10-3 Pa. The characteristics of MW heating of green titanium samples in vacuum are described in terms of the heating rate, vacuum fluctuations, and sparking discharge. The actual MW heating rate achieved from 350 °C to 1200 °C was 34 °C/min. The attendant densities are comparable to those attained by conventional vacuum sintering. Cross-sectional examinations revealed a fairly uniform pore distribution in MW-sintered samples made from either the coarse or fine titanium powder. © (2010) Trans Tech Publications.
Subjects 0912 Materials Engineering
Keyword Microwave sintering
Microwave heating
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

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Created: Sun, 15 Aug 2010, 00:06:42 EST