【摘要】：添加稀土鈰和硼,采用溶膠凝膠和粉末燒結制備了新型氧化鋁彌散強化銅。通過維氏硬度儀、掃描電鏡和光學顯微鏡研究了冷加工率和熱處理對其性能的影響。結果表明:在Cu+Al_2O_3基體中加入修飾劑硼和鈰后,合金的晶格發(fā)生畸變,晶粒尺寸變小,是彌散強化銅硬度提高的主要原因。加入稀土元素鈰對提高彌散強化銅的硬度比添加硼更顯著。在箱式加熱爐中研究了400、600、700℃加熱時對其致密度的影響,發(fā)現(xiàn)在600℃時添加微量鈰和硼,是組織細化和提高致密度的最佳溫度,而加入稀土元素鈰則效果更佳。
[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，

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