抄録
Half-value breadth of X-ray diffraction line profile from the as-plated chromium deposit was found to be about 5.30°, but the same specimens annealed at 600°C gave the half-value breadth of 1.75°. Hard chromium coatings which had wide half-value breadth were characterized by high hardness. Close correlation was also observed between the Micro Vickers hardness and the half-value breadth of X-ray diffraction line. It was found that the hardness of electrodeposited chromium was related to the half-value breadth by the following simple equation, Hv=115B+325. Here, Hv is the value of the Micro Vickers hardness estimated from half-value breadth and B is half-value breadth of X-ray diffraction line. By using this equation, hardness of the chromium coatings can be determined by X-ray diffraction method with deviations of ±4% as compared to the Micro Vickers hardness measurement.
