鎳鈷合金刷鍍層之機械性與磁性研究

The Study on the Mechanical and Magnetic Properties of Selective Plated Nickel-Cobalt Alloy Deposits

鎳鈷合金具有良好之化學安定性、潤滑性、耐蝕性及耐磨性，可作為裝飾、防蝕及磁性方面之應用。本研究主要在探討不同鈷含量鎳鈷合金刷鍍層之機械性與磁性，由硬度測試結果顯示，鎳鈷合金刷鍍層之鈷含量對其硬度有顯著影響，硬度隨鈷含量之增加呈類似倒W形之變化，其中以鈷含量為12%之硬度最低，而鈷含量為37%時之硬度最高。由VSM磁性測量結果顯示，鈷鎳合金刷鍍層之鈷含量增加，飽和磁化量亦隨著增大，其矯頑磁力強度在15-50 Oe之間，顯示鎳鈷合金刷鍍層偏向於軟磁性材料之特質。

Nickel-cobalt alloys could be applied in decoration, anti-corrosion and magnetic use due to their good chemical resistance, lubrication, corrosion protection and abrasion resistance properties. This paper aimed to investigate the mechanical and magnetic properties of selective plated nickel-cobalt alloy deposits with different cobalt content. The hardness test results showed that the hardness change was offered to turn back the W configuration with increasing the cobalt content. The deposit with 12¢Mcobalt content had the lowest hardness, and the hardness of 37¢Mcobalt content deposit was the highest. By VSM measurement, the results showed that the saturation moment of nickel-cobalt alloy deposits increased with increasing the cobalt content, and their coercivity had the values of 15 to 50 Oe. It could be assumed that the selective plated nickelcobalt alloy deposits were soft ferromagnetic materials.