تأثیر مقدار HfC بر خواص مکانیکی کامپوزیت های HfC-W

The effect of HfC content on mechanical properties HfC–W composites

تأثیر مقدار HfC بر خواص مکانیکی کامپوزیت های HfC-W

ABSTRACT

For improving the mechanical properties of tungsten, HfC–W composites were fabricated by ball milling and spark plasma sintering process. Themicrostructure andmechanical properties of the compositeswere investigated. The interdiffusion of the Hf and Watoms during sintering produced a mixed carbide, identified as (Hf,W)C. This interfacial mixed carbide helped in developing a good interface joint with the adjacentW matrix. The increase in mechanical properties of the HfC–W composite at room temperature as well as high temperature was attributed to the reinforcement effect of the HfC particles. One of the strengthening mechanisms of the composite can be attributed to the formation of mixed carbide (Hf,W)C by interdiffusion at the interface, which assured the effective load transfer from the Wmatrix to the hard HfC particles.