Preparation and high-temperature wear behavior of NiAl-Ti3AlC2 fabricated by thermal explosion

In this paper, a novel NiAl-based composite reinforced with different content Ti _3 AlC _2 particles was fabricated by thermal explosion using Ni, Al, and Ti _3 AlC _2 powders as starting materials. The microstructure and high-temperature wear behavior of NiAl-Ti _3 AlC _2 composites at 600 °C were investigated. The result showed that increasing Ti _3 AlC _2 content (lower than 15 wt%) could improve the fracture toughness of NiAl-Ti _3 AlC _2 , but for the composites with 20 wt%Ti _3 AlC _2 content, the fracture toughness decreased due to low relative density. Wear mechanism of composites was related to the Ti _3 AlC _2 content, the composite with a lower content exhibits oxidation wear, and higher content composite demonstrated both oxidation wear and abrasive wear.