Three kinds of full compositional distribution （from 0 to 100wt%W） W/Cu FGMs （functionally graded materials） with high density is fabricated by resistance sintering under ultra-high pressure. Microstructure analys...Three kinds of full compositional distribution （from 0 to 100wt%W） W/Cu FGMs （functionally graded materials） with high density is fabricated by resistance sintering under ultra-high pressure. Microstructure analysis showed that the good grading composition of all FGMs has been obtained. The sintering mechanism of W is mainly solid state sintering. Thermal shock test in air demonstrated that the grading at the interface between W and Cu is effective for the reduction of thermal stress, but obvious transver- se and vertical cracks occur in the pure W layer. The oxidation of the W60Cu40 layer and the W40Cu60 layer is heavier than that of the other layers.展开更多
基金This work was financially supported by the National Natural Science Foundation of China (No.50301001)
文摘Three kinds of full compositional distribution （from 0 to 100wt%W） W/Cu FGMs （functionally graded materials） with high density is fabricated by resistance sintering under ultra-high pressure. Microstructure analysis showed that the good grading composition of all FGMs has been obtained. The sintering mechanism of W is mainly solid state sintering. Thermal shock test in air demonstrated that the grading at the interface between W and Cu is effective for the reduction of thermal stress, but obvious transver- se and vertical cracks occur in the pure W layer. The oxidation of the W60Cu40 layer and the W40Cu60 layer is heavier than that of the other layers.
