Author:
Zagrebelny A. V.,Carter C. B.
Abstract
In polycrystalline liquid-phase sintered (LPS) alumina ceramics, intergranular phases have proved to have a profound effect on mechanical properties such as strength, toughness, plastic deformation, and high-temperature creep. The presence of such intergranular phases, can also influence the kinetics of many processes including sintering, grain growth, and phase transformations. As a result, the key to optimizing the performance of a ceramic material is frequently related to optimizing the properties of these grain boundary regions. In order to understand the interactions between the glass layer and the crystalline grains at a fundamental level, the amorphous material must be placed in contact with the crystalline ceramic as a thin film in a controlled manner. Preparation of such a glass phase in the thin-film geometry has also prompted the use of nontraditional mechanicaltesting techniques.In the present study, interfaces between silicate glass and single-crystal α-Al2O3 have been studied using AFM and nanoindentation.
Publisher
Cambridge University Press (CUP)
Reference6 articles.
1. Research is supported by the U. S. DoE under Grant No. DE-FG02-92ER45465. The AFM and Hysitron indenter are part of the University of Minnesota Characterization Facility supported in part by Center for Interfacial Engineering, an NSF Engineering Research Center.
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