Shuxiang Song

Research on Recent Processing Technologies for Functionally Graded Materials in China

Functionally graded materials (FGMs) are attracting more and more attentions of materials scientists, because their composition, structures and properties vary gradually and continuously from one material to another along one or more direction, which satisfy the demands of the advanced materials. The studies on FGMs have been performed for nearly 20 years around the world. In China, the related research also has been carried out for more than 10 years and some notable progress is noted. This paper presents an overview on emerging technologies for FGMs in China, including ultra‐high consolidation with graded sintering, spark plasma sintering (SPS), self‐propagating high‐temperature synthesis (SHS), thermal spraying, chemical vapor deposition, physical vapor deposition, laser cladding and so on. In addition, various applications of these technologies are presented and some new technologies to the next level are also discussed.

Research on Mo/Cu Functionally Graded Materials by Resistance Sintering Under Ultra‐High Pressure

A newly developed method named “resistance sintering under ultra high pressure” has been invented for the fabrication of Mo/Cu Functionally Graded Materials (FGMs). The consolidation was carried out under pressure of 8 GPa, and input power of 15 kW for 50 s. The relative density of the FGM specimen was above 98% and the composition distribution was nearly the same as the targeted one. The densification effect and microstructure of these FGM samples were investigated. The micro‐hardness and bending strength were measured to evaluate the sintering effects. The sintering mechanism was also studied.