内氧化法制备Al_2O_3/Cu复合材料的再结晶  

Recrystallization of Al_2O_3/ Cu Composite Produced by Internal Oxidation

作　　者：李红霞[1] 田保红[1] 董企铭[1] 刘平[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471039

出　　处：《热加工工艺》2004年第11期19-21,共3页Hot Working Technology

基　　金：河南省自然科学基金资助项目(0122021300)

摘　　要：利用内氧化法制备了Al2O3/Cu复合材料,研究了该材料在不同冷拔变形量和Al2O3含量下,其硬度值随退火温度变化的规律,并进行了显微组织结构分析。结果表明:采用内氧化法制备的Al2O3/Cu复合材料,在铜基体中弥散分布着纳米级的Al2O3颗粒;经900℃×1h退火后,其硬度可保持室温的87%以上;其再结晶温度高达1000℃;变形量和Al2O3含量增加均使硬度提高,但对软化和再结晶温度影响不大。Al_2O_3 dispersion strengthened copper composite was produced by internal oxidation. The hardness depends on temperature for two different content alloys after different cold work deformations was investigated.The microstructures of the samples were also analyzed by TEM. Results show that the nano-alumina particles are homogeneously distributed in Cu-matrix, that the hardness of　the specimens is largely retained after annealing treatment even at high temperatures up to 900℃, and that recrystallization can be largely retarded and not fully completed even annealing after 1h at 1000℃, however, local grain growth can be observed after 1h, 1050℃ annealing treatment. The results also show that increasing either the alumina content or cold deformation degree increases the hardness of the produced Al_2O_3/ Cu composite but exerts little effects on softening and recrystallization temperature over the experimental range.

关 键 词：AL2O3/CU复合材料 再结晶 内氧化 硬度 

分 类 号：TB333[一般工业技术—材料科学与工程]