内氧化工艺对弥散强化铜粉末强化质点特性和显微硬度的影响  

The Effects of Internal Oxidation on the Characteristics of Reinforcing Particles and the Microhardness of the Dispersion-strengthened Copper Powder

作　　者：曹先杰 李娜娜[2] 

机构地区：[1]洛阳铜加工集团国家铜材技术中心,河南洛阳471039 [2]中南大学材料科学与工程系,湖南长沙410083

出　　处：《矿冶工程》2002年第3期101-103,共3页Mining and Metallurgical Engineering

基　　金：科技部创新基金项目 (0 0c2 62 1 4 30 0 352 )

摘　　要：通过对弥散强化铜粉显微硬度的测定以及粉体显微组织结构的观察和分析 ,研究了不同内氧化工艺条件下弥散强化铜粉末显微硬度和强化质点特性的变化。结果表明 :粉体内晶粒度没有明显变化 ;晶粒内的弥散质点为γ′ Al2 O3,这种粒子结构稳定 ,但Al2 O3质点粒度随内氧化温度的升高和时间的延长而增大 ;内氧化工艺影响粉末显微硬度 ,在 90 0℃ 3h时内氧化硬度最高。The effects of internal oxidation treatment on properties of the reinforcing particles and the microhardness of dispersion strengthened oxygen free copper powder were studied. The results show that the size of the grain in the powder does not change visibly; the dispersed particles with a stable structure are γ′ Al 2O 3, the size of which increase with the increase of the temperature and time. The internal oxidation treatment affecs the microhardness, which reached tiptop at 900 ℃ for 3h treatment.

关 键 词：内氧化 弥散强化铜 强化质点特性 显微硬度 铜粉 

分 类 号：TF123.23[冶金工程—粉末冶金]