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.
