Effect of holding time and pressure on the densification, microstructure and mechanical properties of hot pressed Al2O3-CA6-ZrO2/Ni multi-phase composites

Zhang Xi; Han Xiaoyu; Zhang Yuedan; Liang Jinglong; Wang Chuang; Liang Jinsheng

首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Effect of holding time and pressure on the densification, microstructure and mechanical properties of hot pressed Al2O3-CA6-ZrO2/Ni multi-phase composites

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Effect of holding time and pressure on the densification, microstructure and mechanical properties of hot pressed Al2O3-CA6-ZrO2/Ni multi-phase composites

机译：保持时间和压力对热压Al2O3-Ca6-ZrO2 / Ni多相复合材料的致密化，微观结构和力学性能的影响

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Densification, microstructure and mechanical properties of Al2O3-CA6-ZrO2/Ni multi-phase composites depend on different parameters, particular the holding time and pressure during the hot pressing sintering process at 1650 degrees C. In this study, the fine grain size, low porosity and dense structure of composites obtained for a holding time of 30 min under a pressure of 30 MPa. Meanwhile, the wettability between the Ni particles and the matrix was significantly improved owing to the homogeneous distribution of Ni phase. In addition, the systematically optimized sintering parameters resulted in the achievement of a relative density of 98.07% with an excellent Vickers hardness of 16.2 GPa, combining a flexural strength of 458.24 MPa with an acceptable fracture toughness of 7.20 MPa m(1/2) for a holding time of 30 min under a pressure of 30 MPa. The toughening mechanisms of composites are also discussed in detail around the sintering parameters while the dominant ones are the transgranular fracture and crack deflection. (C) 2020 Elsevier B.V. All rights reserved.

机译：Al2O3-CA6-ZrO2/Ni多相复合材料的致密化、微观结构和力学性能取决于不同的参数，尤其是1650℃热压烧结过程中的保温时间和压力。在本研究中，在30MPa的压力下保温30min，可获得细晶粒、低孔隙率和致密结构的复合材料。同时，由于Ni相的均匀分布，Ni颗粒与基体之间的润湿性显著提高。此外，系统优化的烧结参数使相对密度达到98.07%，维氏硬度为16.2 GPa，弯曲强度为458.24 MPa，断裂韧性为7.20 MPa m（1/2），在30 MPa压力下保持30 min。围绕烧结参数详细讨论了复合材料的增韧机理，主要是穿晶断裂和裂纹偏转。（C） 2020爱思唯尔B.V.版权所有。

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来源
《Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics》 |2021年第1期|共10页
作者
Zhang Xi; Han Xiaoyu; Zhang Yuedan; Liang Jinglong; Wang Chuang; Liang Jinsheng;
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作者单位

Hebei Univ Technol Key Lab Special Funct Mat Ecol Environm &

Informa Minist Educ Tianjin 300130 Peoples R China;

Hebei Univ Technol Key Lab Special Funct Mat Ecol Environm &

Informa Minist Educ Tianjin 300130 Peoples R China;

Hebei Univ Technol Key Lab Special Funct Mat Ecol Environm &

Informa Minist Educ Tianjin 300130 Peoples R China;

North China Univ Sci &

Technol Sch Met &

Energy Tangshan 063210 Peoples R China;

North China Univ Sci &

Technol Sch Met &

Energy Tangshan 063210 Peoples R China;

Hebei Univ Technol Key Lab Special Funct Mat Ecol Environm &

Informa Minist Educ Tianjin 300130 Peoples R China;

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原文格式 PDF
正文语种 eng
中图分类合金学与各种性质合金;金属材料;
关键词
Hot pressing; Microstructure; Densification; Mechanical property; Grain size;

机译：热压;微观结构;致密化;机械性质;晶粒尺寸;

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机译：Al2O3粒径对热压Al2O3-Ca6-ZrO2 / Ni多相复合材料的微观结构，相变性能和机械性能的影响
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机译：镍含量对热压TiC-TiB_2-Ni复合材料组织和力学性能的影响
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机译：烧结温度和保温时间对热压WC-40 vol。％Al_2O_3复合材料的致密化，相变，组织和性能的影响
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机译：NiAl / Al_2O_3和NiAl / ZrO_2热压复合材料的组织和力学性能。
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机译：热等静压的钛铝钒钒基均质高梯度复合装甲材料的加工，高应变率性能和弹道性能。
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机译：热挤压生产Ni（sub 3）al（endash）al（sub 2）O（sub 3）复合材料的微观结构和力学性能。

Effect of holding time and pressure on the densification, microstructure and mechanical properties of hot pressed Al2O3-CA6-ZrO2/Ni multi-phase composites

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