摘要
通过对内氧化介质的优化选择，制备了具有高强度、高电导率和高耐热稳定性的弥散强化型Cu-2．65Al2O3复合材料电镜观察与分析表明：晶内均匀分布着纳米γ-Al2O3颗粒，其平均尺寸和颗粒间距分别为7nm和30nm，50％冷变形后的复合材料主要性能如下：电导率51MS／m（87％IACS）、抗拉强度628MPa、硬度HRB86．
Dispersion strengthened Cu-2.65Al2O3 (volume fraction,%) composites with high strength, high electric conductivity and good long-term stability at elevated temperature were fabricated by selecting the optimum internal oxidation mediums. TEM observation and analysis of the composites indicate that the obtained γ-Al2O3 nano-particles are uniformly distributed in Cu grains, their mean size and space between particles are 7 urn and 30 nm respectively. The main properties of the composites after 50% cold deformation are as follows: electric conductivity is 51 MS/m (87%IACS), σb 628 MPa and hardness HRB 86.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第8期888-892,共5页
Acta Metallurgica Sinica
基金
河北省自然科学基金!594086
国家重点自然科学基金!2961080
河北省教委博士基金
关键词
内氧化
弥散强化
复合材料
铜
氧化铝
制备
internal oxidation, dispersion strengthening, Cu-Al_2O_3 composite
