MUMTAZ, K.A. and HOPKINSON, N., 2007. Laser melting functionally graded composition of Waspaloy® and zirconia powders. Journal of Materials Science, 42(18), pp. 7647-7656.
An approach for fabricating functionally graded specimens of supernickel alloy and ceramic
compositions via Selective Laser Melting (SLM) is presented. The focus aimed at using the
Functionally Graded Material (FGM) concept to gradually grade powdered compositions of
Zirconia within a base material of Waspaloy®. A high power Nd:YAG laser was used to
process the material compositions to a high density with gradual but discrete changes
between layered compositions. The graded specimens initially consisted of 100% Waspaloy®
with subsequent layers containing increased volume compositions of Zirconia (0-10%).
Specimens were examined for porosity and microstructure. It was found that specimens
contained an average porosity of 0.34% with a gradual change between layers without any
major interface defects.