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Experimental investigation of the interfacial behavior in single-crystal alumina fiber reinforced alumina matrix composites with porous zirconia interphase
Luleå tekniska universitet.
Luleå tekniska universitet.
1999 (English)In: The 3rd International Nano Ceramic Forum and the 2nd International Symposium on Intermaterials: NCF 3 & IMA '99 ; June 9 - 12, 1999, Paiknam Academic Information Center, Hanyang University, Seoul, Korea / organized by Ceramic Processing Research Center, CPRC, Hanyang University, Korea ... / [ed] Keun Ho Auh, Hanyang: Hanyang Univ. , 1999Conference paper (Refereed)
Abstract [en]

Polycrystalline alumina matrix uniaxially reinforced with monocrystalline alumina fiber (sapphire) composites were fabricated following two different processing routes: hot pressing (HP) and hot isostatic pressing (HIP). A porous zirconia coating was included at the fiber/matrix interface of both types of composite. A microindentation technique (push-out) was used to assess the interfacial properties of the two, and this revealed differences in their push-out behavior as observed in the load-deflection curves. After a progressive debonding observed for both composites, a load drop was recorded at the end of the debonding process for the hot isostatic pressed (HIPed) composite whereas a smooth transition could be observed for the hot pressed composite. Another difference was found in the interfacial behavior of the composites during the purely frictional regime. Undulations in the frictional force were seen in the HIPed composite whereas a regular decrease of the friction load was observed in the hot pressed composite. Fiber roughness and thickness of the interphase materials are taken into account to qualitatively explain these differences

Place, publisher, year, edition, pages
Hanyang: Hanyang Univ. , 1999.
Research subject
Engineering Materials
URN: urn:nbn:se:ltu:diva-34454Local ID: 8a85a340-6634-11de-9f57-000ea68e967bOAI: diva2:1007705
International Nano Ceramic Forum : 09/06/1999 - 12/06/1999
Godkänd; 1999; 20090701 (andbra)Available from: 2016-09-30 Created: 2016-09-30Bibliographically approved

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