Functionally graded（FG） carbon nanotubes（CNT） and nano-silicon carbide（nSiC） reinforced aluminium（Al）matrix composites have been successfully fabricated using high-energy ball milling followed by solid-state s...
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Functionally graded（FG） carbon nanotubes（CNT） and nano-silicon carbide（nSiC） reinforced aluminium（Al）matrix composites have been successfully fabricated using high-energy ball milling followed by solid-state sparkplasmasintering *** CNTs were well-dispersed in the Al particles using the nSiC as a solid mixing *** different types of multi-walled CNTs were used to add different amounts of CNTs in the same *** ball milled Al—CNT—nSiC and Al—CNT powder mixtures were fully densified and demonstrated good adhesion with no serious microcracks and pores within an FG multilayer *** layer contained different amounts of the CNTs,and the nSiC additions showed different microstructures and *** is possible to control the characteristics of the FG multilayer composite through the efficient design of an Al—CNT—nSiC gradient *** concept offers a feasible approach for fabricating the dualnanoparticulate-reinforced Al matrix nanocomposites and can be applied to other scenarios such as polymer and ceramic systems.
The sparkplasmasintering （sps） method is used to prepare the ultrafine copper with the average grain size less than 10 μm and the tensile strength greater than 280 *** ultrafine copper is annealed at different te...
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The sparkplasmasintering （sps） method is used to prepare the ultrafine copper with the average grain size less than 10 μm and the tensile strength greater than 280 *** ultrafine copper is annealed at different temperatures for 60 min,and the annealing microstructure is observed and the hardness and the deformation behavior of the bulk copper are *** results indicate that the grains grow very slowly when the annealing temperature is less than 450 ℃.However,the grain growth becomes remarkable when the annealing temperature exceeds 450 ℃.And the plasticity of the bulk copper is the best when the annealing temperature of 450 ℃ is *** stamping and spin forming,the deformed copper is recrystallized completely and the grain is refined when the copper is annealed at 500 ℃ for 30 min.
Raw Mg,Si powder were used to fabricate Mg2Si bulk thermoelectric generator by sparkplasmasintering （sps）.The optimum parameters to synthesize pure Mg2Si powder were found to be 823 K,0 MPa,10 min with excessive c...
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Raw Mg,Si powder were used to fabricate Mg2Si bulk thermoelectric generator by sparkplasmasintering （sps）.The optimum parameters to synthesize pure Mg2Si powder were found to be 823 K,0 MPa,10 min with excessive content of 10wt% Mg from the stoichiometric ***2Si bulk was synthesized and densified simultaneously at low temperature （823 K） and high pressure （higher than 100 MPa） from the raw powder,but Mg,Si could not react completely,and the sample was not very dense with some microcracks on the ***,Mg,Si powder reacted at 823 K,0 MPa,10 min in sps chamber to form Mg2Si green compact,again sintered by sps at 1023 K,20 MPa,5 *** fabricated sample only contained Mg2Si phase with fully relative density.
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