SiC/Cu composites were prepared by hot pressing. The high temperature tribological properties of the composites were investigated. XRD, SEM techniques were carried out to characterize the samples. It is found that the...SiC/Cu composites were prepared by hot pressing. The high temperature tribological properties of the composites were investigated. XRD, SEM techniques were carried out to characterize the samples. It is found that the friction coefficient of SiC/Cu composites increases with the increasing SiC content. The SiC reinforcement particles are worn down other than removed by pulling out during the wear test. Oxidation of Cu debris leads to the smooth contacting surface. Ring crack is formed under the cyclic wear test. The crack propagates through the damaged matrix and along the brittle interface between SiC particles and Cu matrix.展开更多
采用动态流变学方法考察了1-乙炔基环己醇抑制剂对加成型液体硅橡胶(ALSR)体系硫化行为的影响,并采用凝胶模型和双Arrhenius黏度模型研究了体系硫化动力学。结果表明:1-乙炔基环己醇可大幅增加ALSR体系的硫化时间,硫化时间与炔醇含量的...采用动态流变学方法考察了1-乙炔基环己醇抑制剂对加成型液体硅橡胶(ALSR)体系硫化行为的影响,并采用凝胶模型和双Arrhenius黏度模型研究了体系硫化动力学。结果表明:1-乙炔基环己醇可大幅增加ALSR体系的硫化时间,硫化时间与炔醇含量的关系可由lnt_(gel)=4.65+25.44x表示;凝胶模型和双Arrhenius黏度模型算得的ALSR体系硫化反应活化能分别为94.7和89.1 k J/mol。展开更多
基金Funded by the National Natural Scince Foundation of China (50972132)the Science Fund for Distinguished Young Scholars of Henan Province(512002200)
文摘SiC/Cu composites were prepared by hot pressing. The high temperature tribological properties of the composites were investigated. XRD, SEM techniques were carried out to characterize the samples. It is found that the friction coefficient of SiC/Cu composites increases with the increasing SiC content. The SiC reinforcement particles are worn down other than removed by pulling out during the wear test. Oxidation of Cu debris leads to the smooth contacting surface. Ring crack is formed under the cyclic wear test. The crack propagates through the damaged matrix and along the brittle interface between SiC particles and Cu matrix.
文摘采用动态流变学方法考察了1-乙炔基环己醇抑制剂对加成型液体硅橡胶(ALSR)体系硫化行为的影响,并采用凝胶模型和双Arrhenius黏度模型研究了体系硫化动力学。结果表明:1-乙炔基环己醇可大幅增加ALSR体系的硫化时间,硫化时间与炔醇含量的关系可由lnt_(gel)=4.65+25.44x表示;凝胶模型和双Arrhenius黏度模型算得的ALSR体系硫化反应活化能分别为94.7和89.1 k J/mol。
