Cu-Al合金内氧化工艺参数对性能影响的研究  

Effect of Internal Oxidation Process Parameters of Cu-Al Alloy on Its Properties

作　　者：程建奕[1,2] 敖学文[1] 余方新[1] 谭敦强[1] 

机构地区：[1]南昌大学材料科学与工程学院,南昌330031 [2]九江学院机械与材料工程学院,江西九江332005

出　　处：《材料工程》2010年第7期29-33,共5页Journal of Materials Engineering

基　　金：江西省教育厅科技计划项目资助(赣教技字[2006]271号)

摘　　要：对Cu-0.3Al合金粉末进行了内氧化工艺及其动力学研究。研究表明:在不同内氧化温度条件下,初期(15min)合金的电导率和硬度均显著提高,随内氧化时间延长,电导率和硬度略有提高,一定时间后电导率趋于不变,硬度甚至略有下降,且温度越高硬度达到峰值所需的时间越短。900℃×1h内氧化条件下合金的性能达到最佳,电导率值达到84.6%IACS,硬度高达HV130。内氧化的温度对内氧化析出物A12O3的形核和长大有较大影响,随着内氧化温度的升高和内氧化过程的进行,A12O3粒子的尺寸有所长大,部分粒子发生γ相向粗大的α相的转变。The internal oxidation process and kinetics of Cu-0.3Al alloy powders was studied.The results showed that the electrical conductivity and hardness of Cu-A12O3 alloy increased obviously in the initial stage（about 15 minutes）at different temperature of internal oxidation and increased slightly with the proceeding of internal oxidation.The hardness decreased slightly in the later stage.The time needed by reaching the hardness peak was shortened with the increase of internal oxidation temperature.Hardness and conductivity reached the highest value HV130 and 84.6%IACS respectively under the conditions of 900℃×1h internal oxidation.The temperature had significant influence on the nucleation and growth of A12O3 particles.The size of A12O3 particles increased and a small part of γ-A12O3 particles transformed to the coarse α phase with the increase of temperature and proceeding of internal oxidation.

关 键 词：内氧化 工艺 动力学 弥散强化 

分 类 号：TG146.11[一般工业技术—材料科学与工程]