Functionally Graded Nano Hardmetal Materials Made by Spark Plasma Sintering Technology
The properties of nano WC/Co hardmetals prepared by different Spark Plasma Sintering processes were measured. A 4-layer Functionally Graded Materials (FGM) was also obtained by Spark Plasma Sintering technology (SPS), starting from powders of nano WC/10%Co, nano WC/12%Co, micro WC/15%Co and stainless steel disk. The other 3-layer FGM was made from powders of nano 21%Al2O3/ZrO2, nickel and stainless steel. The SPS processing led to FGM free of internal stress, which was measured using Vickers indentations.
M. Gupta and Christina Y.H. Lim
X. Tan et al., "Functionally Graded Nano Hardmetal Materials Made by Spark Plasma Sintering Technology", Journal of Metastable and Nanocrystalline Materials, Vol. 23, pp. 179-182, 2005