增强颗粒尺寸对<strong>B<sub>4</sub>C/Al-Zn-Mg-Cu</strong>复合材料微观组织及力学性能的影响

doi:10.11901/1005.3093.2022.574

材料研究学报

2023, Vol. 37

Issue (10): 731-738 DOI: 10.11901/1005.3093.2022.574

研究论文

本期目录 | 过刊浏览

增强颗粒尺寸对B₄C/Al-Zn-Mg-Cu复合材料微观组织及力学性能的影响

谢东航¹^,³, 潘冉², 朱士泽³, 王东³(

), 刘振宇³, 昝宇宁³, 肖伯律³, 马宗义³

^1.沈阳理工大学材料科学与工程学院沈阳 110159
^2.中国航空制造技术研究院北京 100024
^3.中国科学院金属研究所沈阳 110016

Effect of Reinforced Particle Size on the Microstructure and Tensile Properties of B₄C/Al-Zn-Mg-Cu Composites

XIE Donghang¹^,³, PAN Ran², ZHU Shize³, WANG Dong³(

), LIU Zhenyu³, ZAN Yuning³, XIAO Bolv³, MA Zongyi³

^1.School of Materials Science and Engineering, Shenyang Ligong University, Shenyang 110159, China
^2.AVIC Manufacturing Technology Institute, Beijing 100024, China
^3.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

引用本文:

谢东航, 潘冉, 朱士泽, 王东, 刘振宇, 昝宇宁, 肖伯律, 马宗义. 增强颗粒尺寸对B₄C/Al-Zn-Mg-Cu复合材料微观组织及力学性能的影响[J]. 材料研究学报, 2023, 37(10): 731-738.
Donghang XIE, Ran PAN, Shize ZHU, Dong WANG, Zhenyu LIU, Yuning ZAN, Bolv XIAO, Zongyi MA. Effect of Reinforced Particle Size on the Microstructure and Tensile Properties of B₄C/Al-Zn-Mg-Cu Composites[J]. Chinese Journal of Materials Research, 2023, 37(10): 731-738.

全文: PDF(9733 KB) HTML

摘要:

用真空热压法制备不同B₄C颗粒尺寸(7 μm、14 μm、20 μm)的15%B₄C/Al-6.5Zn-2.8Mg-1.7Cu复合材料，研究了增强颗粒尺寸对其微观组织和力学性能的影响。结果表明，在这三种复合材料中B₄C颗粒均匀分布，B₄C-Al界面反应较为轻微，未见明显的界面反应产物。三种复合材料基体中沉淀相的尺寸基本相同(约为5.5 nm)。B₄C颗粒的尺寸对复合材料力学性能有较大的影响。B₄C颗粒尺寸为7 μm的复合材料性能最佳，屈服强度为648 MPa，抗拉强度为713 MPa，延伸率为3.3%。随着颗粒尺寸的增大复合材料的强度和延伸率均降低。对三种复合材料的强化机制和断裂机制的分析结果表明：小尺寸B₄C颗粒增强的复合材料强度较高，颗粒在变形过程中不易断裂，因此其塑性较好。

关键词 ：复合材料, 铝基, 粉末冶金, 界面反应, 颗粒尺寸, 力学性能

Abstract：

Composites 15%B₄C/Al-6.5Zn-2.8Mg-1.7Cu with various size (7 μm, 14 μm, 20 μm) of reinforced paricales B₄C were prepared by powder metallurgy vacuum hot pressing method. B₄C particles can be uniformly distributed in the three composite materials, and the B₄C-Al interface reaction is relatively slight, and no obvious interfacial reaction products are observed. In the matrix of the three composites, the size of the precipitates is basically the same, all of which are about 5.5 nm. When the B₄C particle size is 7 μm, the composite has the best performance, i.e., yield strength of 648 MPa, tensile strength of 713 MPa and elongation of 3.3%. With the increase of particle size, the strength and elongation of the composites decreased. The strengthening mechanism and fracture mechanism of the three composites were analyzed, and the results showed that the composite reinforced with smaller B₄C particles had higher strength. The particles are not easy to break during deformation, so they have better plasticity.

Key words： composites Al alloy matrix powder metallurgy interface reaction particle size mechanical properties

收稿日期: 2022-10-31

ZTFLH:

TB333

基金资助:国家重点研发计划(2021YFA1600704);北京自然科学基金(3214053);辽宁省兴辽英才计划(XLYC2007009)

通讯作者: 王东，研究员，dongwang@imr.ac.cn，研究方向为铝基复合材料

Corresponding author: WANG Dong, Tel: (024)23971752, E-mail: dongwang@imr.ac.cn

作者简介: 谢东航，男，1998年生，硕士生

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图1 增强相尺寸不同的15%B4C/Al-6.5Zn-2.8Mg-1.7Cu复合材料的OM图

图2 增强相尺寸不同的B4C/Al-6.5Zn-2.8Mg-1.7Cu复合材料的SEM形貌和EDS图

图3 增强相尺寸不同的B4C/Al-6.5Zn-2.8Mg-1.7Cu复合材料人工时效态的XRD谱

图4 增强相尺寸不同的B4C/Al-6.5Zn-2.8Mg-1.7Cu复合材料人工时效态沉淀相的TEM形貌

表1 不同颗粒尺寸B4C/Al-6.5Zn-2.8Mg-1.7Cu复合材料的拉伸性能

图5 不同颗粒尺寸的B4C/Al-6.5Zn-2.8Mg-1.7Cu复合材料断口的SEM形貌

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