The influence of spark plasma sintering(SPS)temperature on microstructure,hardness and corrosion behavior of a high-energy ball milled Mg-10wt%Al alloy was investigated in this work.The holding time and sintering pres...The influence of spark plasma sintering(SPS)temperature on microstructure,hardness and corrosion behavior of a high-energy ball milled Mg-10wt%Al alloy was investigated in this work.The holding time and sintering pressure for SPS were kept constant while varying the sintering temperature from 200 to 350℃.The grain size and microstructure were studied using X-ray diffraction analysis,scanning electron microscopy,energy dispersive X-ray spectroscopy,and Archimedes'based density measurement.Corrosion behavior was investigated using potentiodynamic polarization tests.The nanocrystalline regime(grain size<100nm)was maintained even after SPS up to 350℃.The density of the alloy increased with increasing the SPS temperature.Vickers'hardness and corrosion performance improved up to 300℃ followed by a decrease after SPS at 350℃.Possible reasons for densification,strengthening,and corrosion behavior have been discussed in the light of reduced porosity and microstructural changes.展开更多
空气包覆是一个运用新的组合特点将两种或更多的纱线组合成均匀纱线的过程。这种纱线制织的织物穿着舒适,并可通过改变纱线弹性满足不同的成品要求。空气包覆纱可用以生产不同风格、手感及功能的织物,可根据其性能设计机织物及针织物。...空气包覆是一个运用新的组合特点将两种或更多的纱线组合成均匀纱线的过程。这种纱线制织的织物穿着舒适,并可通过改变纱线弹性满足不同的成品要求。空气包覆纱可用以生产不同风格、手感及功能的织物,可根据其性能设计机织物及针织物。研究了气压对聚酯和氨纶空气包覆纱不同性能的影响。分别使用392、588、785 k Pa的气压生产纱线。结果表明:纱线线密度、线圈密度、线圈稳定性及聚酯纱含量随气压的增大而增加。展开更多
基金RKG acknowledges the financial support from the National Science Foundation(NSF-CMMI 1846887)under the direction of Dr.Alexis Lewis.
文摘The influence of spark plasma sintering(SPS)temperature on microstructure,hardness and corrosion behavior of a high-energy ball milled Mg-10wt%Al alloy was investigated in this work.The holding time and sintering pressure for SPS were kept constant while varying the sintering temperature from 200 to 350℃.The grain size and microstructure were studied using X-ray diffraction analysis,scanning electron microscopy,energy dispersive X-ray spectroscopy,and Archimedes'based density measurement.Corrosion behavior was investigated using potentiodynamic polarization tests.The nanocrystalline regime(grain size<100nm)was maintained even after SPS up to 350℃.The density of the alloy increased with increasing the SPS temperature.Vickers'hardness and corrosion performance improved up to 300℃ followed by a decrease after SPS at 350℃.Possible reasons for densification,strengthening,and corrosion behavior have been discussed in the light of reduced porosity and microstructural changes.
文摘空气包覆是一个运用新的组合特点将两种或更多的纱线组合成均匀纱线的过程。这种纱线制织的织物穿着舒适,并可通过改变纱线弹性满足不同的成品要求。空气包覆纱可用以生产不同风格、手感及功能的织物,可根据其性能设计机织物及针织物。研究了气压对聚酯和氨纶空气包覆纱不同性能的影响。分别使用392、588、785 k Pa的气压生产纱线。结果表明:纱线线密度、线圈密度、线圈稳定性及聚酯纱含量随气压的增大而增加。
