PREPARATION AND PROPERTIES OF X-SIALON

Zhou Y.; Laoui T.; Ratchev P.; Vanderbiest O.; Vleugels J.

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PREPARATION AND PROPERTIES OF X-SIALON

机译：X-SIALON的制备及性能

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X-sialon has been produced by hot pressing Si3N4-Al2O3-SiO2 powder mixtures and Si3N4 powder-mullite gel mixtures at 1650 degrees C. The formation mechanism of X-sialon has been studied and is correlated with the processing technique for the two preparation routes. Microprobe analysis of the obtained X-sialon phase, combined with previous observed compositions and literature formulae suggests that, at 1650 degrees C, X-sialon exists as a narrow solid solubility region on the Si3N4-mullite line in the Si3N4-SiO2-Al2O3-AlN phase diagram. The physical, mechanical and chemical properties of X-sialon have been evaluated. X-sialon has a modest hardness of 1280 kg mm(-2), a fracture toughness of 1.7 MPa m(1/2), and an elastic modulus of 213 GPa. X-sialon exhibits excel lent chemical stability in contact with iron-based alloys at 1200 degrees C. [References: 23]

机译：通过在1650℃下热压Si3N4-Al2O3-SiO2粉末混合物和Si3N4粉末-莫来石凝胶混合物来制备X-赛隆。X-赛隆的形成机理已得到研究，并与这两种制备途径的加工工艺有关。对所得的X-sialon相进行微探针分析，再结合先前观察到的组成和文献公式，表明在1650摄氏度时，X-sialon在Si3N4-SiO2-Al2O3-中的Si3N4-莫来石线上以狭窄的固溶区存在。 AlN相图。 X-赛隆的物理，机械和化学性能已得到评估。 X-sialon的中等硬度为1280 kg mm（-2），断裂韧性为1.7 MPa m（1/2），弹性模量为213 GPa。 X-sialon在1200摄氏度与铁基合金接触时表现出卓越的化学稳定性。[参考文献：23]

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《Journal of Materials Science》 |1995年第18期|共7页
作者
Zhou Y.; Laoui T.; Ratchev P.; Vanderbiest O.; Vleugels J.;
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正文语种 eng
中图分类工程材料学;
关键词
Nitrogen ceramics; Phase;

机译：氮陶瓷;相;

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PREPARATION AND PROPERTIES OF X-SIALON

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