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三元共晶成分Al2O3/YAG/ZrO2粉体及陶瓷的制备与组织性能研究
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哈尔滨工业大学材料科学与工程学院,哈尔滨工业大学材料科学与工程学院,哈尔滨工业大学材料科学与工程学院,哈尔滨工业大学材料科学与工程学院,哈尔滨工业大学材料科学与工程学院,哈尔滨工业大学材料科学与工程学院,哈尔滨工业大学材料科学与工程学院,哈尔滨工业大学材料科学与工程学院

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国家自然科学基金资助(项目号51572061, 51621091, 50572020)


Preparation, microstructure and properties of ternary Al2O3/YAG/ZrO2 ceramics hot pressed with eutectic composition powders
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School of Materials Science and Engineering,Harbin Institute of Technology,School of Materials Science and Engineering,Harbin Institute of Technology,School of Materials Science and Engineering,Harbin Institute of Technology,School of Materials Science and Engineering,Harbin Institute of Technology,School of Materials Science and Engineering,Harbin Institute of Technology,School of Materials Science and Engineering,Harbin Institute of Technology,School of Materials Science and Engineering,Harbin Institute of Technology,School of Materials Science and Engineering,Harbin Institute of Technology

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    摘要:

    本文采用醇水共沉淀法制备了三元共晶成分Al2O3/YAG/ZrO2粉体,在600-1350oC温度范围煅烧后研究其物相转变过程。经1300oC煅烧后Al2O3/YAG/ZrO2共晶成分粉体的物相由α-Al2O3、c-ZrO2和YAG构成,且具有α-Al2O3相包裹c-ZrO2相的特殊结构。将煅烧粉体在1550oC下热压烧结,制备具有内晶型结构的共晶成分Al2O3/YAG/ZrO2复相陶瓷,其致密度、室温抗弯强度、断裂韧性和高温(1000oC)抗弯强度分别为98.8%、420 MPa、3.69 MPa.m1/2和464 MPa,并对复相陶瓷组织结构的形成机理进行了探讨。

    Abstract:

    Al2O3/YAG/ZrO2 powders with eutectic composition have been synthesized by the chemical co-precipitation in acohol-water aqueous solution and calcination method, and are characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The precursors were calcined at temperatures of 600oC-1350oC in air, and the phase transition process was then revealed with increasing the calcination temperature. Al2O3/YAG/ZrO2 powders calcined at 1300oC for 1h consist of α-Al2O3, YAG and c-ZrO2 phases. Al2O3/YAG/ZrO2 ceramics with eutectic composition were hot-pressed at 1550oC with the above-mentioned powders. The Al2O3/YAG/ZrO2 ceramic sintered at 1550oC contains an intragranular microstructure, and exhibits a relative density of 98.8%, a room-temperature flexural strength of 420 MPa, a fracture toughness of 3.69 MPa.m1/2 and a high-temperature (1000oC) flexural strength of 464MPa, respectively. The formation mechanism of an intragranular microstructure in the Al2O3/YAG/ZrO2 ceramic has been proposed.

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欧阳家虎,喻天罡,马永辉,王志刚,Henniche Abdelkhalek,刘占国,王玉金,周玉.三元共晶成分Al2O3/YAG/ZrO2粉体及陶瓷的制备与组织性能研究[J].稀有金属材料与工程,2018,47(S1):288~293.[Jiahu Ouyang, Tiangang Yu, Yonghui Ma, Zhigang Wang, Henniche Abdelkhalek, Zhanguo Liu, Yujin Wang, Yu Zhou. Preparation, microstructure and properties of ternary Al2O3/YAG/ZrO2 ceramics hot pressed with eutectic composition powders[J]. Rare Metal Materials and Engineering,2018,47(S1):288~293.]
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  • 收稿日期:2017-07-03
  • 最后修改日期:2017-07-14
  • 录用日期:2018-02-26
  • 在线发布日期: 2018-10-22
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