Abstract
Degrees of homogenization (H) of Cu-50 mass%Ni alloy powders produced by flame spraying technique were evaluated by adopting Rudman's method from X-ray diffraction profiles.For producing flame sprayed alloys, Cu-50 mass%Ni mixed powder compacts with various Cu and Ni particle sizes were extruded after heating at 1023K for 600s to rods having 3.0mm diameter. Then, they were flame sprayed under a constant flame spraying condition.Degrees of homogenization (H) of rods for flame spraying were estimated to be 0.249, 0.387 and 0.620 for 100-150, 200-250 and -350 mesh particle sizes of starting Cu and Ni powders, respectively. Whereas, H values of flame sprayed alloy powders were estimated to be 0.746, 0.805 and 0.838 for the same particle sizes as the above mentioned starting powders, respectively.H values obtained from Rudman's method are commonly inclined to show lower values; H value of melted and then fully homogenized Cu-50 mass%Ni alloy was 0.898, smaller than unity. However, the Rudman's method is usefull on estimating the degree of homogenization quantitatively.
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