Fabrication of W–Cu composite by resistance sintering under ultra-high pressure

Characterization of fine-grained W–10wt.% Cu composite fabricated by hot-shock consolidation

“…Further densification can be obtained only by filling residual pores with Cu, which are mainly determined by temperature not pressure. A similar conclusion was also presented in resistance sintering of W-Cu composites [15], where the densification was associated with ultra-high pressure.…”

“…Novel sintering techniques have been explored to improve W-Cu composite densifications, which includes plasma spraying [9], laser sintering [10], microwave sintering [8,11,12] and powder injection molding [13]; but the deterioration due to high sintering temperature and long processing time is still not overcome. Then methods utilizing ultra-high pressure are developed to fabricate W-Cu composites, such as Hot-pressing method [14] and resistance sintering [15,16], which apparently lower sintering temperature and shorten sintering time. Resistance sintering is considered as a promising method for the fabrication of metals with a fine-grain microstructure.…”

Characterization of W/Fe functionally graded materials manufactured by resistance sintering under ultra-high pressure

“…A special experimental setup depicted in the reference [8,9] is used to fabricate W/Fe bulk FGM. Several experimental parameters are compared in author's other work [9] and the optimized parameters used in this work are consisted of pressures: 9 GPa, an electric power input: 11 kW and sintering times: 60 s. Heat treatment has been done at 800 • C for 1 h to release residual stress as well as to enhance material properties.…”

“…The processing of RSUHP is introduced specifically in authors' papers [8,9]. Iron powders are used instead of EUROFER steel powders in this work.…”

Fabrication of tungsten-copper composites by hot-shock consolidation

“…Tungsten-Cu composites have received much attention for application in heat sink and electrical contact materials due to the prominent thermal and electrical properties of coppers, as well the high melting point, low vapor pressure and good erosion resistance of W [1].…”