Abstract

The phase changes in electroless Ni-B deposits during heat treatment are reported in this paper.The experiments were conducted by thermal and X-ray analyses in nearly the same method as in the previous reports.The results obtained were as follows:1) The hardness after heat treatment of electroless Ni-B deposits exhibited its maximum at about 400°C as shown in the curves.2) Exothermic change was observed at about 270°C in the curves plotted by thermal analysis of electroless Ni-B deposits.3) It was possible to comfirm the formation of nickel boride at the temperature of exothermic change, judging from the X-ray diffraction pattern of electroless Ni-B deposits.

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