冷加工和热处理对添加硼铈的弥散强化铜性能的影响
发布时间：2018-10-10 18:01
【摘要】：添加稀土铈和硼,采用溶胶凝胶和粉末烧结制备了新型氧化铝弥散强化铜。通过维氏硬度仪、扫描电镜和光学显微镜研究了冷加工率和热处理对其性能的影响。结果表明:在Cu+Al_2O_3基体中加入修饰剂硼和铈后,合金的晶格发生畸变,晶粒尺寸变小,是弥散强化铜硬度提高的主要原因。加入稀土元素铈对提高弥散强化铜的硬度比添加硼更显著。在箱式加热炉中研究了400、600、700℃加热时对其致密度的影响,发现在600℃时添加微量铈和硼,是组织细化和提高致密度的最佳温度,而加入稀土元素铈则效果更佳。
[Abstract]:A new type of alumina dispersion strengthened copper was prepared by adding rare earth cerium and boron in sol-gel and powder sintering. The effects of cold working rate and heat treatment on its properties were studied by Vickers hardness tester, scanning electron microscope and optical microscope. The results show that when boron and cerium are added to the Cu Al_2O_3 matrix, the lattice distortion and grain size become smaller, which is the main reason for the increase of the hardness of dispersion strengthened copper. Addition of rare earth element cerium can improve the hardness of dispersion-strengthened copper more significantly than adding boron. The effect of heating at 400600700 鈩，
本文编号：2262752
[Abstract]:A new type of alumina dispersion strengthened copper was prepared by adding rare earth cerium and boron in sol-gel and powder sintering. The effects of cold working rate and heat treatment on its properties were studied by Vickers hardness tester, scanning electron microscope and optical microscope. The results show that when boron and cerium are added to the Cu Al_2O_3 matrix, the lattice distortion and grain size become smaller, which is the main reason for the increase of the hardness of dispersion strengthened copper. Addition of rare earth element cerium can improve the hardness of dispersion-strengthened copper more significantly than adding boron. The effect of heating at 400600700 鈩，
本文编号：2262752
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