MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Aluminide Coating on Niobium by Arc Surface Alloying
Kiyotaka MatsuuraTakayuki KoyanagiTatsuya OhmiMasayuki Kudoh
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2003 Volume 44 Issue 5 Pages 861-865

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Abstract

A new method for surface modification based on the arc surface alloying has been proposed and its feasibility has been investigated performing niobium aluminide coating on a niobium base metal. When tungsten arc was used to melt an aluminum plate placed on a niobium block, the niobium surface was also melted and a melt pool of an Al–Nb binary alloy was formed on the niobium block. The melt pool solidified into niobium aluminides on the surface of the niobium block, forming a thick NbAl3 layer on the top surface of the coating layer. When an Al–Si alloy plate was used instead of the aluminum plate, a niobium almino–silicide layer was formed on the niobium block.

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© 2003 The Japan Institute of Metals and Materials
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