REN Jianshi
,
ZHANG Gongshu Institute of Metal Research
,
Academia Sinica.Shenyang
,
China WANG Zhenshu
,
LIU Gen
,
LIU Shenglin Shanghai University of Technology
,
Shengyang
,
China
金属学报(英文版)
Investigation was made of the sputtering rate in glow discharge lamp with relaion to constituent of 25 different specimens of 6 binary systems.namely,Cr-Fe,Bi-Sb,Cu-Zn, Ag-Cu,Al-Zn and Cd-Sn.by measuring mass loss sfter each sputtering under constant Ar pressure and voltage applicd.The correlation.in general,between sputtering rate and concentration of constituent of these non-intermetallic binary alloys obeys the hyperbolic law under steady state,that may be approximately regarded as linear correlation only on certain special condition if the two components of the alloys with similar sputte ringrates.
关键词:
eathode sputtering
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LIU Wei WANG Qun ZHAO Xinguo ZHAO Tong ZHANG Zhidong SUN Xiaokai Institute of Metal Research
,
Academia Sinica
,
Shengyang
,
China research assistant
,
Institute of Metal Research
,
Academia Sinica
,
Shenyang 110015
,
China
金属学报(英文版)
Using pure Sm and Fe powders as starting materials,high coercive Sm-Fe-N mag- nets have been prepared by mechanical alloying in combination with beat treatment and nitriding.The best result is:_iH_c=33.1 kA/cm(41.6 kOe)and(BH)_(max)=98.7 kJ/cm~3(12.4 MGOe).The phases formed in the specimens during mechanical alloying, crystallizing and nitriding processes were examined by X-ray diffraction technique.The magnetic properties of the specimens were measured with the pulsed magnetometer in field up to 12 T.Experimental results show that mechanical alloying is an efficient ap- proach for preparing high coercive magnets.As an important factor for obtaining a high coercivity,the grain sizes of magnets are about tens of nanometer.The presence of some soft magnetic phases in the specimens leads to a neck on the demagnetization curve.
关键词:
Sm-Fe-N magnet
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