Centrifugal casting was applied to produce cylindrical castings using SiCp/Al composite slurry,which contained 20%SiC particles.The castings comprised a particle free zone and a particle rich zone.The amount of SiC pa...Centrifugal casting was applied to produce cylindrical castings using SiCp/Al composite slurry,which contained 20%SiC particles.The castings comprised a particle free zone and a particle rich zone.The amount of SiC particles had a dramatic transformation from the particle rich zone to the particle free zone,and the maximum content of SiC particles in the particle rich zone reached up to 40 vol%.The ultimate tensile strength（UTS） of the as-cast SiCp / Al composites in the particle rich zone was 143 MPa,and the fracture was caused by the desorption of SiC particles from matrix alloy.The coefficient of thermal expansion（CTE） of the SiC_p / Al composites in the range of 20 and 100 ℃ was determined as 16.67×10^（-6） s^（-1）,and the experimental CTE was lower than the predicted data based on the Kerner＇s model.The results show that the decrease in CTE in the case of the composites at high temperature stage can be attributed to the solute concentration of Si in Al and the plastic deformation of the matrix alloy in the composites with void architecture.展开更多
In an attempt to find leading thiazole carboxanilides exhibiting fungicidal activities, we designed and synthesized a new series of 2-sulfursubstituted thiazole carboxanilides via the reaction between 2-sulfur substit...In an attempt to find leading thiazole carboxanilides exhibiting fungicidal activities, we designed and synthesized a new series of 2-sulfursubstituted thiazole carboxanilides via the reaction between 2-sulfur substituted thiazole carboxylic acid chlorides and substituted aniline. The fungicidal activities of the title compounds against Rhizoctonia solani were screened and the results were remarkable. The most potent compound 8i, N-[2~6-dich~~r^-4-（tri^u~r^methy~）pheny~]-2-methy^thi^-4-（tri^u~r^methy~）thiaz~~e-5-~arb^xamide~ was identified. The fungicidal ECs0 of compound 8i against Rhizoctonia solani was 1.28 mg/L, being comparable to that of Thiflu- zamide. The results indicate that compound 8i can be considered as a lead compound for further research.展开更多
基金Funded by the National Natural Science Foundation of China(No.51174244)the Foundational and Cutting-edge Research Plan of Chongqing,China(No.csts2013jcyj A50014)the Fundamental Research Funds for Central University,China(No.CDJZR12240056)
文摘Centrifugal casting was applied to produce cylindrical castings using SiCp/Al composite slurry,which contained 20%SiC particles.The castings comprised a particle free zone and a particle rich zone.The amount of SiC particles had a dramatic transformation from the particle rich zone to the particle free zone,and the maximum content of SiC particles in the particle rich zone reached up to 40 vol%.The ultimate tensile strength（UTS） of the as-cast SiCp / Al composites in the particle rich zone was 143 MPa,and the fracture was caused by the desorption of SiC particles from matrix alloy.The coefficient of thermal expansion（CTE） of the SiC_p / Al composites in the range of 20 and 100 ℃ was determined as 16.67×10^（-6） s^（-1）,and the experimental CTE was lower than the predicted data based on the Kerner＇s model.The results show that the decrease in CTE in the case of the composites at high temperature stage can be attributed to the solute concentration of Si in Al and the plastic deformation of the matrix alloy in the composites with void architecture.
基金National Key Research and Development Program of China(2016YFB0301100)Chongqing Research Program of Basic Research and Frontier Technology(cstc2015jcyjBX0036)+1 种基金National Natural Science Foundation of China(51571040)Sharing Fund of Chongqing University’s Large-Scale Equipment
基金National Great Engineering Research Project of China(2016YFB0301101)Chongqing Technology Innovation and Application Development Special Project(cstc2019jscx-mbdxX0033)。
基金Supported by the National Natural Science Foundation of China（Nos.21272062, 21572050）.
文摘In an attempt to find leading thiazole carboxanilides exhibiting fungicidal activities, we designed and synthesized a new series of 2-sulfursubstituted thiazole carboxanilides via the reaction between 2-sulfur substituted thiazole carboxylic acid chlorides and substituted aniline. The fungicidal activities of the title compounds against Rhizoctonia solani were screened and the results were remarkable. The most potent compound 8i, N-[2~6-dich~~r^-4-（tri^u~r^methy~）pheny~]-2-methy^thi^-4-（tri^u~r^methy~）thiaz~~e-5-~arb^xamide~ was identified. The fungicidal ECs0 of compound 8i against Rhizoctonia solani was 1.28 mg/L, being comparable to that of Thiflu- zamide. The results indicate that compound 8i can be considered as a lead compound for further research.
