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    RISS 인기검색어

      Diffusion Induced Grain-Boundary Migration and Mechanical Property Improvement in Alumina

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      https://www.riss.kr/link?id=E805460

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      다국어 초록 (Multilingual Abstract)

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      When 1 wt%-Fe_(2)O_(3) added AI_(2)O_(3) samples were sintered in a reducing atmosphere, the excess Fe_(2)O_(3) remained as Fe precipitates at the triple grain-junctions. On annealing the sintered samples in an oxidizing atmosphere, however, the Fe precipitates dissolved into AI_(2)O_(3) grains at the surface region and induced grain-boundary migration. The sample with grain-boundary migration showed better mechanical properties than that without migration: improvement in the critical load for cone crack initiation and reduction of surface chipping at the contact area under cyclic loading. It appears that DIGM is a possible means of improving the mechanical properties of AI_(2)O_(3).
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      When 1 wt%-Fe_(2)O_(3) added AI_(2)O_(3) samples were sintered in a reducing atmosphere, the excess Fe_(2)O_(3) remained as Fe precipitates at the triple grain-junctions. On annealing the sintered samples in an oxidizing atmosphere, however, the Fe pr...

      When 1 wt%-Fe_(2)O_(3) added AI_(2)O_(3) samples were sintered in a reducing atmosphere, the excess Fe_(2)O_(3) remained as Fe precipitates at the triple grain-junctions. On annealing the sintered samples in an oxidizing atmosphere, however, the Fe precipitates dissolved into AI_(2)O_(3) grains at the surface region and induced grain-boundary migration. The sample with grain-boundary migration showed better mechanical properties than that without migration: improvement in the critical load for cone crack initiation and reduction of surface chipping at the contact area under cyclic loading. It appears that DIGM is a possible means of improving the mechanical properties of AI_(2)O_(3).

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      목차 (Table of Contents)

      • 1. INTRODUCTION
      • 2. EXPERIMENTAL PROCEDURE
      • 3. RESULTS AND DISCUSSION
      • ACKNOWLEDGMENT
      • REFERENCES
      • 1. INTRODUCTION
      • 2. EXPERIMENTAL PROCEDURE
      • 3. RESULTS AND DISCUSSION
      • ACKNOWLEDGMENT
      • REFERENCES
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