Raction Synthesis of Y2O3/AlN Ceramic and Mechanism of Densification

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Journal of Materials Engineering ›› 2000, Vol. 0 ›› Issue (3) : 36-38,48.

Raction Synthesis of Y₂O₃/AlN Ceramic and Mechanism of Densification

ZHENG Yongting, HAN Jiecai, ZHANG Xinghong, DU Shanyi, HE Xiaodong

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Abstract

Compact AlN/Y₂O₃ceramics were fabricated by combustion synthesis of Al particles in the super high pressure nitrogen(1000atm).In the SHS process of AlN₂ Y₂O₃ system,when the temperature was up to 1760℃,eutectic melt Y₃Al₅O₁₂was formed from Y₂O₃and Al₂O₃,then liquid sinter occurred With increasing of Y₂O₃content in the original powder system, porosity of the products decreased,content of the plastic Al in the products increased, then bending strength and fracture toughness increased In AlN₂Y₂O₃>system, SHS densification have apparent tropism, mainly occurred along the combustion front.

Key words

AlN ceramic / combustion synthesis / Y₂O₃³ / densification / SHS HIP

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ZHENG Yongting, HAN Jiecai, ZHANG Xinghong, DU Shanyi, HE Xiaodong. Raction Synthesis of Y₂O₃/AlN Ceramic and Mechanism of Densification[J]. Journal of Materials Engineering, 2000, 0(3): 36-38,48

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