Studies on the Structure of Electroless-Plated Nickel Films

Autor:	Yoshimi Tanabe, Shigeo Urai
Rok vydání:	1967
Předmět:	Diffraction Materials science Phosphide chemistry.chemical_element law.invention Amorphous solid Crystallography Nickel chemistry.chemical_compound Electron diffraction Chemical engineering chemistry law Lamellar structure Crystallization Eutectic system
Zdroj:	Journal of the Metal Finishing Society of Japan. 18:435-440
ISSN:	1884-3395 0026-0614
DOI:	10.4139/sfj1950.18.435
Popis:	Effects of heat treatments and P content of electroless-plated nickel films on their structure were investigated by means of X-ray diffraction method and electron microscope.As-deposited nickel films formed lamellar structure due to the change in bath composition. As the results of electron diffraction analysis, it was found that the structure of as-deposited nickel films was converted from face-centred-cubic lattice (about 4wt.% of P) into amorphous state (7.4wt.% of P). By heating at below 200°C, phosphorus atoms gradually began to diffuse, by which the crystallization of nickel was promoted. At higher temperatures, stable phosphide (Ni3P) was found in the film. When the temperature of heat treatment was more higher, the grains of phosphide grew larger and coagulated. Nickel layer was formed on substrate iron and eutectic structure consisting of Ni and Ni3P was observed on outer surface of the films as if the structure had been formed as a block being pressed to the surface.
Databáze:	OpenAIRE
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