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OALib Journal期刊
ISSN: 2333-9721
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Nature and Growth of Interaction Layers Formed during the Reaction between Solid Ni and Liquid Al

Keywords: Wetting,Isothermal reaction,Aluminizing
相互作用层
,固态镍,液态铝,润湿,等温反应,金属

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Abstract:

The nature and growth of the interaction layers between solid Nb and liquid Al has been studied by carrying out the tests on Nb(s)-Al(l) and Nb(s)-Al(l)-Ni(s) reaction couples isothermally reacted between 700℃ and 900℃ for different time intervals.It has been found that the interaction layer between Nb and Al contains two parts: a thin continuous layer of NbAl3 adjacent to the Nb surface and a two-phase zone constituted of NbAl3 particles dispersed in an Al matrix. Although the nature and growth of interaction layers follows the four-stage mechanism, a typical cruciform pattern does not occur in Nb(s)-Al(l) reaction couples. However, a cruciform pattern was observed in Nb(s)-Al(l)-Ni(s) reaction couples. The movement of NbAl3 particles is important to the production of cruciform pattern in the reaction couples.

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