摘要
通过引入高能球磨,为Al2O3/Cu复合材料的内氧化工艺提供了新的粉末制备途径。高能球磨可制备亚稳态的Cu Al预合金粉末,使用该粉末进行内氧化,既可避免复杂的雾化制粉装置,又可使Al的脱溶氧化变得容易,缩短内氧化的周期;Cu2O粉末与Cu Al预合金粉末一起进行球磨,一方面改善了粉末内氧化的动力学条件,另一方面避免了Cu2O分解后产生的富铜相。球磨过程适宜的酒精加入量为15mL/100g粉料。Cu Al系粉末在经过96h的球磨后合金已经形成,合金粉末向层片结构发展,此时粒子已经细化。X射线衍射图谱中Al的衍射峰的消失是Cu Al系粉末形成合金的标志,并不是晶粒细化所致。Cu 2 0%Al比Cu 0 8%Al的合金更容易细化,层片结构更突出。
A new fabrication approach of internally oxidized powder for Al2O3/Cu composites was provided by introducing high energy milling. This approach involves the high energy milling of Cu powder and Al powder to produce Cu-Al prealloyed powder, and high energy milling of Cu-Al prealloyed powder together with Cu2O powder. It has been observed that this approach avoids using complicated atomizing equipment, on the other hand it has improved the kinetics condition of internal oxidation, then the time of internal oxidation may be shortened, as well as the rich Cu phase resulting from the decomposition of Cu2O is avoided. The rational adding content of alcohol is 15 mL/100 g powder during milling. Cu-Al prealloyed powder is formed after 96 h milling, and the structure of powders trends towards sandwich while the grain of powder is fined. The disappearance of Al diffraction peak results from the formation of Cu-Al prealloy, not from the grain fining. Cu-2.0wt%Al powder is more easier to be fined than Cu-0.8wt% powder, and sandwich is bigger and thinner.
出处
《粉末冶金技术》
EI
CAS
CSCD
北大核心
2003年第4期201-205,共5页
Powder Metallurgy Technology
基金
陕西省教育厅科技基金资助
项目 (0 2JK131)
关键词
AL2O3/CU复合材料
内氧化
复合粉末
高能球磨
制备
Ball milling
Fabrication
High energy forming
Internal oxidation
Metallic matrix composites
Sandwich structures
