D-gun Sprayed Fe-Al Single Particle Solidification

Archives of Metallurgy and Materials

J. Morgiel¹  G. Garzeł¹  W. Wołczyński¹  C. Senderowski² 

[1] INSTITUTE OF METALLURGY AND MATERIALS SCIENCE, 25 REYMONTA STR., 30 059 KRAKÓW, POLAND;MILITARY UNIVERSITY OF TECHNOLOGY, 2 KALISKIEGO STR., 00-908 WARSZAWA, POLAND

关键词: Keywords: Fe-Al coating;    Ni-20Cr interlayer;    rapid solidification;    D-gun spraying;    boron localization;    competitive growth of phases;   

DOI  :  10.2478/amm-2014-0034

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

Some Fe-Al particles less than 50 μm in diameter were deposited onto the steel substrate by means of the D-gun spraying. A solidification mechanism of an individual particle is described. The particle subjected to the description contained nominally 63 at.% Al. The description was preceded by the TEM / SAED analysis of both the Fe-Al coating and Ni-20Cr interlayer. The whole number of the analyzed particles was partially melted during the deposition. The solidification products like: amorphous phase sub-layer, oscillatory sub-layer which contains two types lamellae distributed alternately and typically non-equilibrium phase sub-layer were revealed. In the micro scale, solidification was considered as a process which occurred in two directions: towards the substrate and towards the non-melted particle part. Both solidification processes underwent the positive thermal gradients. The boron addition was localized within the eutectic precipitates pushed and then rejected by the solid/liquid interface of the solidifying non-equilibrium phase. The proposed model is a general one and therefore can be applied to other systems ;description.

【 授权许可】

Unknown