材料期刊网

Oxygen Relief/Absorption and Superconductivity of Bi-Pb-Sr-Ca-Cu-O Compounds

QIN Zuoxiang , ZHANG Yansheng , ZHU Naiping Department of Materials Engineering , Dalian Railway Institute , Dalian , 116022 , China.Institute of Metal Research , Academia Sinica , Shenyang , 110015 , China.

材料科学技术（英文）

The oxygen relief/absorption,superconduc— tivity and structure of(Bi_(1-x)Pb_x)_2Sr_2Ca_2— Cu_3O_y compounds have been studied by TGA, electrical resistance measurement and X-ray diffraction.The amount of oxygen which can be re- leased and superconductivity of the compounds are correlative to Pb con...

关键词: oxygen relief/absorption , null , null , null

The Use of Image Analysis to Simulate Growth Kinetics of Ferrite by Carbon Diffusion in SG Cast Iron

HU Yixiang Central Laboratory , Dalian Locomotive Factory , Dalian , 116022 , China.

材料科学技术（英文）

关键词: image analysis , null , null

Low Ductility at Elevated Temperatures of the Cryogenic and Non-magnetic Steel Fe-23Mn-4Al-SCr-0.3C

TIAN Xing ZHANG Yansheng Dalian Railway Institute , Dalian , 116022 , China

材料科学技术（英文）

The origin of low ductility at elevated tempera- ture in the cryogenic and non-magnetic steel Fe-23Mn-4Al-5Cr-0.3C was investigated by means of impact test at elevated temperatures,opti- cal microscope,SEM and TEM.The experimental results indicate that the impact toughness lowers with increasing tes...

关键词: ductility , null , null , null , null