Rapid Densification of Cold-Sprayed Ti-6Al-4V Coatings via Induction Heating

The rapid densification behavior of powder metallurgy Ti alloys by induction heating sintering

Microstructure, mechanical property and cutting performance of (Ti,W)C/Mo/Co/Ni cermet tool material prepared by spark plasma sintering and high frequency induction heating

For the formation of composite structures, Co or Ni is added as a binder, in the case of cemented TiC. However, the high cost of Co or Ni, and the low corrosion resistance of TiC­Co or TiC­Ni cermet have generated interest in recent years to find alternative binder phases. It has been reported that aluminides show higher oxidation resistance and hardness, and cheaper materials, compared to Co or Ni. Using a high-frequency induction heated sintering (HFIHS) method, the densification of TiC and TiC­TiAl hard materials was accomplished within 3min. The advantages of this process are the prohibition of grain growth in nano-structured materials, and the rapid densification to near theoretical density. Highly dense TiC­TiAl hard materials with a relative packing density of up to 100% were obtained by HFIHS, under a pressure of 80MPa. The average grain size of the TiC was lower than 100 nm. The addition of TiAl to TiC significantly improves the fracture toughness of cemented TiC, without greatly decreasing the hardness. [doi:10.2320/matertrans.M2014160]

Extremely dense WC with a relative density of up to 99% was obtained within five minutes under a pressure of 80 MPa using the High-Frequency Induction Heated Sintering method. The average grain size of the WC was about 71 nm. The advantage of this process is not only rapid densification to obtain a neartheoretical density but also the prohibition of grain growth in nano-structured materials. The hardness and fracture toughness of the dense WC produced by HFIHS were 2660 kg·mm and 7.2 MPa·m, respectively. (Received September 6, 2010)

Properties and rapid consolidation of ultra-hard tungsten carbide

Rapid consolidation of nanostructured WC-FeAl hard composites by high-frequency induction heating and its mechanical properties