Microstructure and sliding-wear behavior of tungsten-reinforced W-Ni-Si metal-slicide in-situ composites

From: Metallurgical and Materials Transactions | Date: September 1, 2003| Author: | Copyright information

W-Ni-Si metal-silicide-matrix in-situ composites reinforced by tungsten primary grains were fabricated using a water-cooled copper-mold laser-melting furnace by the LASMELT process. Main constitutional phases of the W/W-Ni-Si in-situ composites are the tungsten primary phase, peritectic W^sub 2^Ni^sub 3^Si, and the remaining W^sub 2^Ni^sub 3^Si/Ni^sub 31^Si^sub 12^ eutectics, depending on the alloy compositions. The sliding-wear resistance of the WIW-Ni-Si intermetallic composites was evaluated at room temperature and 600 deg C. Wear mechanisms of the W/W^sub 2^Ni^sub 3^Si in-situ composites ...

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