電解Ni-Pメッキ皮膜の熱処理による相変化
1966 年 17 巻 10 号 p. 384-388
詳細
1966 年 17 巻 10 号 p. 384-388
The phase changes of electrolytic Ni-P deposits during heat treatment are reported in this paper. Ni-13% P deposits were prepared by controlling the compositions of bath. The experimental methods in thermal and X-ray analyses were similar to those in the previous report, except for additional magnetic analysis.
The results obtained were as follows:
(1) The change of hardness in the heat treatment of electrolytic Ni-P deposits showed similar behavior to that of electroless Ni-P deposits.
(2) The evolution of heat occurred at 360°C in the heat treatment of the electrolytic deposit, which was higher than that temperature found in electroless deposit. The above result showed that phosphorus in electrolytic deposit would be like red phosphorus.
(3) The formation of nickel phosphide during that treatment at 350°C was also identified by X-ray analysis.
(4) Susceptibility of electrolytic Ni-P deposit at room temperature was smaller as compared with electrolytic pure Ni deposit. It was observed in the curve for magnetic analysis in the heated state that the intensity began to increase at 200°C followed by the following three regions: decrease at 300-340°C, rapid increase at 350-360°C, and final decrease above 360°C.
