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Enhancement of corrosion resistance in sintered Nd-Fe-B permanent magnet doping with different CuZn5 contents 被引量:7
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作者 Zhuang Wang Wei-Qiang Liu +3 位作者 Dong-Tao Zhang Ming Yue Xiu-Lian Huang Xu-Liang Li 《Rare Metals》 SCIE EI CAS CSCD 2017年第10期812-815,共4页
Nd-Fe-B permanent magnets doped with CuZn5 powders were prepared via conventional sintered method. The effects of CuZn5 contents on magnetic properties and corrosion resistance of the magnets were sys- tematically stu... Nd-Fe-B permanent magnets doped with CuZn5 powders were prepared via conventional sintered method. The effects of CuZn5 contents on magnetic properties and corrosion resistance of the magnets were sys- tematically studied. It shows that the remanence, coercivity, and maximum energy product decrease gradually with the increase in CuZn5 doping content. The magnet's corrosion kinetics in autoclaves environment and its electrochemical properties in electrolytes were also examined. It is interesting to see that the weight loss of 3.5 wt% and 4.5 wt% CuZn5 powders doping magnets is only 1 and 0 mg.cm^-2 after autoclaves test at 121 ℃, 2 × 10^5 Pa for 500 h, respectively, which is much lower than that of the magnets without CuZn5 doping. Electrochemical results show that the CuZn5 powders doping magnets display more positive corrosion potential (Eoorr) and lower corrosion current density (Icorr) than those of the original magnets without CuZn5 doping in sulphuric acid electrolyte and distilled water. It is, therefore, concluded that doping CuZn5 powders is a promising way to enhance the corrosion resistance of sintered Nd-Fe-B magnets. 展开更多
关键词 Sintered Nd-Fe-B magnet Corrosion resistance cuzn5 powders AUTOCLAVE Polarization characteristics
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铜和锶对可生物降解锌合金显微组织和力学性能的影响 被引量:1
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作者 胡玉书 张恒华 +1 位作者 马义明 沈乔盛 《上海金属》 CAS 2022年第5期66-71,共6页
制备了不同铜、锶含量的可生物降解锌合金,对其分别进行了340℃保温4、6和8 h的均匀化处理,研究了铜和锶元素以及均匀化处理时间对合金组织和力学性能的影响。结果表明:随着铜质量分数从1%增加到3%,合金中ε相的数量增加,其平均尺寸从6... 制备了不同铜、锶含量的可生物降解锌合金,对其分别进行了340℃保温4、6和8 h的均匀化处理,研究了铜和锶元素以及均匀化处理时间对合金组织和力学性能的影响。结果表明:随着铜质量分数从1%增加到3%,合金中ε相的数量增加,其平均尺寸从6.96μm增大至10.92μm,合金的抗拉强度首先从102.1 MPa上升至129.4 MPa,随后下降至126.8 MPa;随着锶质量分数从0.10%提高到0.15%,合金中SrZn相的数量增加,其平均尺寸从13.48μm增大至15.63μm,合金的抗拉强度从112.6 MPa提高到129.4 MPa,断后伸长率从1.23%下降至1.03%;均匀化处理时间越长,合金晶粒越粗大,ε相数量越少,合金力学性能下降。 展开更多
关键词 可生物降解锌合金 cuzn5 SrZn13相 显微组织 力学性能 均匀化处理
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