In this study,TiC/CM247LC nickel-based composite was successfully prepared by selective laser melting,then was heat treated at a solid solution temperature of 1260℃and different aging temperature of 840℃,870℃,900℃...In this study,TiC/CM247LC nickel-based composite was successfully prepared by selective laser melting,then was heat treated at a solid solution temperature of 1260℃and different aging temperature of 840℃,870℃,900℃and 930℃respectively.Effects of aging temperatures on the microstructures and mechanical properties were systematically studied.The results show that the microstructures of all the heat treated samples are composed ofγmatrix,carbides andγ′phase.Theγgrains remain a columnar shape after treatments,but the size ofγ′phase grows up gradually with the increasing aging temperature.The composite treated at an aging temperature of 870℃exhibits the best mechanical properties with the tensile strength of 1073 MPa,yield strength of 1004 MPa and elongation of 7.57%.The plastic deformation and strengthening mechanisms of heat treated composite were systematically investigated.展开更多
The effective treatment of volatile organic compounds(VOCs)is essential because of their direct effects on air pollution and human health.This paper introduces microwave-induced metal discharge as a highly effective a...The effective treatment of volatile organic compounds(VOCs)is essential because of their direct effects on air pollution and human health.This paper introduces microwave-induced metal discharge as a highly effective and byproduct value-added approach to degrade high-concentration toluene as a model VOC.The effect of the factors that influence the discharge intensity,including the metal type(Fe,Cu,Ni,Zn)and amount,was investigated.Degradation efficiency of toluene can reach 79.76% under optimal discharge condition.In addition,the discharge method was compared with traditional thermal destruction at 700℃,900℃ and 1100℃.The gaseous and liquid cracking products of toluene produced by the microwave-induced metal discharge method were almost similar to those obtained under thermal destruction at 900℃;however,the solid-phase discharge products were nanoparticles that demonstrated good graphitization,while the thermal destruction products were amorphous microparticles.This work offers an effective and flexible way to degrade high-concentration VOCs and also provides an application reference for biomass tar cracking and removal of other organic pollutants.展开更多
基金he financial supports provided by the Shandong Provincial Natural Science Foundation General Program under Grant No.ZR2023ME062.
文摘In this study,TiC/CM247LC nickel-based composite was successfully prepared by selective laser melting,then was heat treated at a solid solution temperature of 1260℃and different aging temperature of 840℃,870℃,900℃and 930℃respectively.Effects of aging temperatures on the microstructures and mechanical properties were systematically studied.The results show that the microstructures of all the heat treated samples are composed ofγmatrix,carbides andγ′phase.Theγgrains remain a columnar shape after treatments,but the size ofγ′phase grows up gradually with the increasing aging temperature.The composite treated at an aging temperature of 870℃exhibits the best mechanical properties with the tensile strength of 1073 MPa,yield strength of 1004 MPa and elongation of 7.57%.The plastic deformation and strengthening mechanisms of heat treated composite were systematically investigated.
基金supported by the National Key Research and Development Program of China(Grant No.2018YFB0605200)Natural Science Foundation of China(Grant No.51976110)+2 种基金Young Scholars Program of Shandong University(Grant No.2018WLJH75)Fundamental Research Funds of Shandong University(Grant No.2017GN009)Natural Science Foundation of Shandong Province(Grant No.ZR2019MEE035).
文摘The effective treatment of volatile organic compounds(VOCs)is essential because of their direct effects on air pollution and human health.This paper introduces microwave-induced metal discharge as a highly effective and byproduct value-added approach to degrade high-concentration toluene as a model VOC.The effect of the factors that influence the discharge intensity,including the metal type(Fe,Cu,Ni,Zn)and amount,was investigated.Degradation efficiency of toluene can reach 79.76% under optimal discharge condition.In addition,the discharge method was compared with traditional thermal destruction at 700℃,900℃ and 1100℃.The gaseous and liquid cracking products of toluene produced by the microwave-induced metal discharge method were almost similar to those obtained under thermal destruction at 900℃;however,the solid-phase discharge products were nanoparticles that demonstrated good graphitization,while the thermal destruction products were amorphous microparticles.This work offers an effective and flexible way to degrade high-concentration VOCs and also provides an application reference for biomass tar cracking and removal of other organic pollutants.
