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The properties of Mg protected by Al- and Al/Zn-enriched layers containing intermetallic phases

机译：含金属间相的富含Al和Al / Zn的层保护Mg的性能

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摘要

The alloyed layers were produced on Mg by heating the specimens in contact with pure Al powder or Al + Zn powder mixtures. The powder material acting as the source of diffusion elements was held under pressure during heating, and this led to the formation of thick, continuous layers in a short heating time (1 h). The layer formation process took place through partial melting at the substrate/ powder interface. The Al-enriched layer was characterized by a eutectic structure composed of an Mg_(17)Al_(12) intermetallic phase and a solid solution of Al in Mg. The Al/Zn-enriched layers produced from Al + 20% Zn and Al + 40% Zn powder mixtures consisted of Mg_(17)(Al,Zn)_(12) and Mg_5Al_2Zn_2 and a solid solution of Al and Zn in Mg. The alloyed layers had higher hardness and better wear resistance than the Mg substrate. The results of the polarization measurements show that the Al- and the Al/Zn-enriched layers provide a certain level of protection to Mg against corrosion.
机译：通过加热与纯Al粉末或Al + Zn粉末混合物接触的样品，在Mg上产生合金层。用作扩散元素来源的粉末材料在加热过程中保持在压力下，这导致在较短的加热时间（1小时）内形成连续的厚层。通过在基材/粉末界面处部分熔融来进行层形成过程。富铝层的特征在于由Mg_（17）Al_（12）金属间相和Al在Mg中的固溶体组成的共晶结构。由Al + 20％Zn和Al + 40％Zn粉末混合物制得的Al / Zn富集层由Mg_（17）（Al，Zn）_（12）和Mg_5Al_2Zn_2以及Al和Zn在Mg中的固溶体组成。合金层比Mg衬底具有更高的硬度和更好的耐磨性。极化测量的结果表明，富含Al和Al / Zn的层为镁提供了一定程度的防腐蚀保护。

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  • 来源
    《Journal of Materials Research》 |2015年第23期|3682-3691|共10页
  • 作者

    Renata Mola;

  • 作者单位

    Faculty of Mechatronics and Mechanical Engineering, Kielce University of Technology, Al. Tysiaclecia P.P. 7, 25-314 Kielce, Poland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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