内氧化法制备Al_2O_3/Cu复合材料的再结晶行为  

Recrystallization Behavior of Al_2O_3/Cu Composite Produced by Internal Oxidation

作　　者：李红霞[1] 田保红[1] 林阳明[1] 李士凯[1] 刘平[1] 

机构地区：[1]河南科技大学,河南洛阳471039

出　　处：《稀有金属材料与工程》2005年第7期1039-1042,共4页Rare Metal Materials and Engineering

基　　金：河南省自然科学基金资助(0122021300)

摘　　要：以Cu2O为氧化剂,采用Cu-Al合金粉末内氧化及后续的粉末冶金法制备了Al2O3/Cu复合材料。并将不同Al2O3含量的试样进行不同变形量的冷拔处理,在氮气保护下进行高温退火处理(700℃～1050℃,1h)。研究了硬度随退火温度的变化规律,观察了显微组织。结果表明:在铜基体中弥散分布着纳米级的Al2O3颗粒;经900℃,1h退火后Al2O3/Cu复合材料的硬度可保持室温的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。Using Cu2O as oxidizer, Al2O3 dispersion strengthened copper composite was produced by Cu-Al alloy powder internal oxidation and followed by powder metallurgy. The samples with the different contents of Al2O3 were cold drawn at the different rates of the deformation, then were annealed at 700 degrees C-1050 degrees C for 1 h in nitrogen atmosphere. The variation of the hardness with the annealing temperature was studied, and the microstructures of the samples were observed. The results show that the nano-alumina particles are homogeneously distributed in Cu-matrix, the hardness of the samples annealed at 900 degrees C for 1 h can be up to 87% of that at the room temperature and their recrystallization temperature can reach 1000 degrees C. The results also show that increasing of the alumina content or cold deformation rate will increase the hardness of the produced Al2O3/Cu composite but has 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：TB331[一般工业技术—材料科学与工程]