Electroless plating copper coating of Al18B4O33 whisker for interface improvement of whisker reinforced aluminium matrix composite
Electroless plating copper coating of Al18B4O33 whisker for interface improvement of whisker reinforced aluminium matrix composite
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DOI：
10.1179/174328407x239091
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发表时间：
2007-12
影响因子：
1.8
通讯作者：
H. Gao;L. Wang;W. Fei
中科院分区：
文献类型：
--
作者：
H. Gao;L. Wang;W. Fei
挤压铸造硼酸铝晶须增强6061Al基复合材料存在严重的界面反应。为了控制界面反应，采用化学镀的方法在硼酸铝晶须上沉积铜层。对镀层的扫描电子显微镜观察表明，镀液的pH值和甲醛浓度对镀铜层的微观形貌有影响。研究了pH值和甲醛浓度对铜沉积速率的影响。采用挤压铸造法制备了铜包覆和未包覆晶须增强的6061Al基复合材料。结果表明，晶须表面镀铜能有效地控制复合材料的界面反应。涂层显著提高了复合材料的极限拉伸强度。此外，固溶处理还可以进一步提高涂层晶须增强复合材料的极限拉伸强度。
There exists serious interfacial reaction in squeeze casting aluminium borate whisker reinforced 6061Al matrix composite. To control the interfacial reaction, an electroless plating method is used to deposit Cu coating on aluminium borate whiskers. The scanning electron microscope observations of the coating indicate that the micrograph of copper coating is affected by pH value and HCHO concentration of the plating bath. The effect of pH value and HCHO concentration on deposition rate of copper is also studied. By using squeeze casting method, 6061Al matrix composites reinforced by copper coated or uncoated whisker were fabricated. It is found that Cu coating of whisker is effective in controlling the interfacial reaction in the composite. The ultimate tensile strength of composite is enhanced greatly by the coating. In addition, the solution treatment can improve further the ultimate tensile strength of the composite reinforced by coated whisker.