(四川大學(xué)金屬材料系，成都 610065
國(guó)營(yíng)建中化工總公司，宜賓 644000)
摘 要: 向工業(yè)純銅中加入不同含量的鋰能提高其300 ℃以下的低溫抗氧化性，鋰的最佳含量為0.0288%，這是由于在銅的表面生成一種致密度較高的LiCuO新相，阻礙或減緩空氣中的氧在銅基體中的擴(kuò)散所致；溫度較高時(shí)其抗氧化性降低，鋰含量越高抗氧化性能越差，鋰易于在氧化膜的缺陷處富集，嚴(yán)重時(shí)會(huì)在氧化膜中及銅基體中形成大空洞或連成網(wǎng)狀，從而降低其保護(hù)性。
關(guān)鍵字: 鋰 工業(yè)純銅 抗氧化性
（Department of Metal Materials, Sichuan University, Chengdu 610065, P. R. China
State-owned Jianzhong Chemical Company, Yibin 644000, P. R. China）
Abstract:Different contents of lithium added in the industrial pure copper can improve its anti-oxidizability at low temperature below 300 ℃ and the best content is 0.0288%, this is because a new material (LiCuO) is formed, dellaying the diffusing speed of oxygen in the copper. When the temperature is higher, the anti-oxidizability decreases with the increase of lithium content. Lithium is easy to deposit in the defects of the oxidizing film and linked up to be large cavities or net work, so the lithium decreases the protection from oxidation.
Key words: lithium; copper; anti-oxidization
