질화규소의 기계적 성질 및 접촉 손상 : II. 미세구조의 영향Mechanical Properties and Contact Damage of Silicon Nitrides Nitrides : II. Effect of Microstructure

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The effect of the α/β phase fraction on the mechanical properties in silicon nitrides was investigated in part 1. In part II, we describe the role of microstructure on the mechanical properties and contact damage of silicon nitrides with coarse/equiaxed and coarse/elongated microstructures. Grain sizes and shapes were controlled by starting powder. Hertzian indentation using spherical indenter was also used to investigate contact damage behavior. Cone cracks from the spherical indentation were suppressed when the silicon nitride contains coarse and elongated grains. Coarse and elongated grains played an important role of cone crack suppression. The size of quasi-plastic zone does not depend on grain size or shape but depends on the fraction of α/β phase. A quasi-plastic zone was consisting of microcracks by shear stress during indentation.
Publisher
한국분말야금학회
Issue Date
1998-01
Language
Korean
Citation

한국분말야금학회지, v.5, no.1, pp.22 - 27

ISSN
1225-7591
URI
http://hdl.handle.net/10203/75474
Appears in Collection
MS-Journal Papers(저널논문)
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