Structural Relaxation and Crystallization of NiP and NiCoP
Amorphous Coatings Produced by Chemical Deposition

Yu. O. Akulova* and N. O. Gonchukova**

* St. Petersburg State Technical University, ul. Politekhnicheskaya 29, St. Petersburg, 195251 Russia
** Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences,
ul. Odoevskogo 24/2, St. Petersburg, 199155 Russia

Received April 21, 1998

Abstract—The structural relaxation and crystallization in the Ni–P and Ni–Co–P coatings (14–28 at. % P) are
studied by differential scanning calorimetry. It is shown that the structural relaxation in amorphous materials
produced by chemical deposition is similar to that in the glasses prepared by rapid quenching of the melt. The
relaxation changes in properties of chemically deposited amorphous materials can be evaluated by the Tool–
Narayanaswamy model of glass transition. An example of this estimation is provided by the Ni–P coating
(14 at. % P).

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