Growth Mechanism of Helicoidal Nickel Whiskers

Grange, G and Jourdan, C (1969) Growth Mechanism of Helicoidal Nickel Whiskers. In: UNSPECIFIED.



NICKEL whiskers obtained by reduction of the iodide of the metal can be classified into two categories : (i) rectilinear whiskers (ii) helicoidal whiskers In general, these whiskers are formed by a stacking of small idiomorphic crystals. The law governing such stackings was determined theoretically in a previous investigation .1,2 It was shown that they were formed from nickel iodide in fusion and that the theory of dendritic growth was quite true for rectilinear whiskers ; the axes of growth are of low indices ( <111->, ---100> ) and the conditions required for dendritic growth as described by Papapetrou3 are fulfilled. Rectilinear whiskers without branches are obtained, because one of the directions of dendritic growth is favoured and the development takes place only in that direction. This paper presents a study of the growth mechanisms of helicoidal whiskers.

Item Type:Conference or Workshop Item (UNSPECIFIED)
Official URL/DOI:
Uncontrolled Keywords:Rectilinear whiskers, helicoidal whiskers, idiomorphic crystals
Divisions:Metal Extraction and Forming
ID Code:3903
Deposited By:Sahu A K
Deposited On:08 Sep 2011 17:51
Last Modified:13 Jan 2012 12:06
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