TEM Observation of Microstructure in Silicon Nitride Ceramics Containing Y<sub>2</sub>O<sub>3</sub>-Nd<sub>2</sub>O<sub>3</sub> Additive
نویسندگان
چکیده
منابع مشابه
Microstructure of Spark Plasma-Sintered Silicon Nitride Ceramics
The microstructure and phase composition of the high-content Al2O3-Y2O3-doped spark plasma-sintered silicon nitride were investigated. Fully dense silicon nitride ceramics with a typical α-Si3N4 equiaxed structure with average grain size from 200 to 530 nm, high elastic modulus of 288 GPa, and high hardness of 2038 HV were spark plasma sintered (SPSed) at 1550 °C. Silicon nitride with elongated...
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Silicon nitride (Si(3)N(4)) is a ceramic material developed for industrial applications that demand high strength and fracture resistance under extreme operating conditions. Recently, Si(3)N(4) has been used as an orthopedic biomaterial, to promote bone fusion in spinal surgery and to develop bearings that can improve the wear and longevity of prosthetic hip and knee joints. Si(3)N(4) has been ...
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Extensive transmission electron microscopy (TEM) has been performed to study the microstructure evolution of a self-reinforced silicon nitride associated with high temperature creep. A large population of strain whorls is observed in samples crept at relatively high temperatures and the strain whorls are not necessarily asymmetrical with respect to the grain boundary normal. Large angle converg...
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ژورنال
عنوان ژورنال: Journal of the Ceramic Society of Japan
سال: 1998
ISSN: 0914-5400,1882-1022
DOI: 10.2109/jcersj.106.441