The dynamic tensile processes of silicon carbide whisker reinforced Al composite(SiC_w/Al)with 22% V_f have been in situ observed with a scanning electron micro
The Bi-Sr-Ca-Cu-O suterconducting ceramics with T_c(onset)=112K,T_c(R=0)=85.3 K were prepared by quenching process.The Meissner effect of the sampleappears at a