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Effect of heating rate on porous TiAl-based intermetallics synthesized by thermal explosion
School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou.
School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou.
School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou.
School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou.
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Number of Authors: 62017 (English)In: Materials and Manufacturing Processes, ISSN 1042-6914, E-ISSN 1532-2475, Vol. 32, no 5, p. 489-494Article in journal (Refereed) Published
Abstract [en]

TiAl-based porous materials were synthesized by a novel process of thermal explosion (TE) reaction. The effect of heating rate on expansion behavior of powder assemblies, phase compositions and pore structures were investigated. Results showed that the actual temperature of specimen increased rapidly from 655-661 °C (furnace temperature) to 1018–1136 °C (combustion temperature) in a short time interval of 25–55 s, indicating that an obvious TE reaction occurred at different heating rates (1, 2, 5 and 10°C · min−1). TE reaction in Ti/Al powder assemblies resulted in formation of open-celled TiAl-based intermetallics. When the heating rate was set at 5 °C · min−1, the maximum open porosity of 59% was obtained in Ti-Al bodies, which experienced the highest combustion temperature (1136°C) and underwent maximum volume expansion (48%). The pore size distribution was uniform and pores were interconnected in TE products.

Place, publisher, year, edition, pages
2017. Vol. 32, no 5, p. 489-494
National Category
Other Materials Engineering
Research subject
Engineering Materials
Identifiers
URN: urn:nbn:se:ltu:diva-59935DOI: 10.1080/10426914.2016.1232826ISI: 000395350100006Scopus ID: 2-s2.0-85000961915OAI: oai:DiVA.org:ltu-59935DiVA, id: diva2:1039892
Note

Validerad; 2017; Nivå 2; 2017-03-06 (rokbeg)

Available from: 2016-10-25 Created: 2016-10-25 Last updated: 2018-07-10Bibliographically approved

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Akhtar, Farid

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