CAJ | 학술논문

在不添加外氧化剂Cu2 O的条件下,通过外氧化法生成氧化剂Cu2 O,真空条件下进行Al2 O3内氧化与烧结、热挤压和冷拉拔制备了Al2 O3颗粒弥散强化的铜基复合材料,对其微观组织和硬度、导电率进行了分析测试。结果表明：外氧化法制备的Al2 O3/Cu复合材料,随着Al2 O3含量的增加,材料的硬度增加,而导电率减小；进行热挤压变形后,Al2 O3/Cu复合材料的硬度随变形量的增加而增加,而导电率降低；制备的冷拉拔变形率为24.8%的1.04wt.%Al2 O3/Cu复合材料硬度为69.2 HRB,导电率为73.6%IACS。
재불첨가외양화제Cu2 O적조건하,통과외양화법생성양화제Cu2 O,진공조건하진행Al2 O3내양화여소결、열제압화랭랍발제비료Al2 O3과립미산강화적동기복합재료,대기미관조직화경도、도전솔진행료분석측시。결과표명：외양화법제비적Al2 O3/Cu복합재료,수착Al2 O3함량적증가,재료적경도증가,이도전솔감소；진행열제압변형후,Al2 O3/Cu복합재료적경도수변형량적증가이증가,이도전솔강저；제비적랭랍발변형솔위24.8%적1.04wt.%Al2 O3/Cu복합재료경도위69.2 HRB,도전솔위73.6%IACS。
The Al2 O3 particles dispersion strengthened copper matrix composites were prepared with the condition of not adding any Cu2 O as oxidant,but by external oxidation in a furnace to generate Cu2 O oxidant in advance, internal oxidation to generate Al2 O3 and sintered in a vacuum furnace,and then cold drawing after hot extrusion. The microstructure of experiment materials were analyzed by SEM,and the hardness and conductivity were tested. The results showed that with the increase of Al203 ,the hardness of Al2 O3/Cu composites would increase,while the conductivity would decrease. After hot extrusion deformation,the Rockwell hardness of Al2 O3/Cu composites would increase with the increase of deformation ratio, but the conductivity would decrease. The hardness and electrical conductivity of 1. 04wt.%Al2 O3/Cu composite with 24. 8% hot extrusion deformation ratio can reach 69. 2 HRB and 73. 6% IACS.