Investigation on Ductile Property of CePO4 Ceramic
来源期刊：JOURNAL OF RARE EARTHS2003年第6期
论文作者：王丽娟 霍伟荣 王凯利 高海 刘家臣
Key words：ceramic; ductile; microstructure; cerium phosphate; rare earths;
Abstract: Average grain size of chemicalty synthesized CePO4 powder increases with incre asing calcining temperature. The strength 184 Mpa and toughness 4.8 Mpa*m1/ 2 were achieved when the green compacts were sintered at 1500 ℃ for 2 h in air . They show that stepped or multilayered fracture occurs within CePO4 granules. CePO4 ceramic could be cut, drilled or turned easily using conventional metal-machining tools. Continuous machining debris was observed on turned surface. Indentation pressure stress-strain curve showes extensive nonlinear behavior, and a series of microcracks which crack cross and occur along the extrusion stre ss direction were observed on extruded surface, indicating single-phase CePO4 ceramic is "ductile". Based on the fracture analyses in cross-section surface, the ductility of CePO4 ceramic is considered to be associated with the cleavage of multilayered CePO4 grains and the fragment resetting to adapt to stress.
王丽娟1，霍伟荣1，王凯利1，高海1，刘家臣1
(1.Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education, Tianjin University 300072, China)
Abstract:Average grain size of chemicalty synthesized CePO4 powder increases with incre asing calcining temperature. The strength 184 Mpa and toughness 4.8 Mpa*m1/ 2 were achieved when the green compacts were sintered at 1500 ℃ for 2 h in air . They show that stepped or multilayered fracture occurs within CePO4 granules. CePO4 ceramic could be cut, drilled or turned easily using conventional metal-machining tools. Continuous machining debris was observed on turned surface. Indentation pressure stress-strain curve showes extensive nonlinear behavior, and a series of microcracks which crack cross and occur along the extrusion stre ss direction were observed on extruded surface, indicating single-phase CePO4 ceramic is "ductile". Based on the fracture analyses in cross-section surface, the ductility of CePO4 ceramic is considered to be associated with the cleavage of multilayered CePO4 grains and the fragment resetting to adapt to stress.
Key words:ceramic; ductile; microstructure; cerium phosphate; rare earths;
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