Phase Transformations in the Surface Layer of Compact Zirconium Nitride-Based Ceramics


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We have studied structural, morphological, and phase transformations in the surface layer of compact zirconium nitride-based ceramics during high-temperature annealing in vacuum, nitrogen, and air. The formation of oxygen-containing phases during heat treatment of ZrN is controlled by bulk and grain-boundary oxygen diffusion. At the beginning of the process, oxygen is supplied by an amorphous surface layer, which always forms during the ceramic preparation process. In air, the process is driven by oxygen indiffusion from the gas phase across an initially forming porous oxide layer. Grain-boundary oxygen diffusion leads to the formation of a crystalline zirconium oxide layer on grain boundaries and crack nucleation.

作者简介

I. Kovalev

Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences

Email: aogarkov@imet.ac.ru
俄罗斯联邦, Leninskii pr. 49, Moscow, 119334

A. Shokodko

Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences

Email: aogarkov@imet.ac.ru
俄罗斯联邦, Leninskii pr. 49, Moscow, 119334

A. Ogarkov

Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences

编辑信件的主要联系方式.
Email: aogarkov@imet.ac.ru
俄罗斯联邦, Leninskii pr. 49, Moscow, 119334

S. Shevtsov

Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences

Email: aogarkov@imet.ac.ru
俄罗斯联邦, Leninskii pr. 49, Moscow, 119334

A. Konovalov

Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences

Email: aogarkov@imet.ac.ru
俄罗斯联邦, Leninskii pr. 49, Moscow, 119334

S. Kannykin

Voronezh State University

Email: aogarkov@imet.ac.ru
俄罗斯联邦, Universitetskaya pl. 1, Voronezh, 394018

A. Ashmarin

Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences

Email: aogarkov@imet.ac.ru
俄罗斯联邦, Leninskii pr. 49, Moscow, 119334

T. Kolomiets

Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences

Email: aogarkov@imet.ac.ru
俄罗斯联邦, Leninskii pr. 49, Moscow, 119334

A. Chernyavskii

Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences

Email: aogarkov@imet.ac.ru
俄罗斯联邦, Leninskii pr. 49, Moscow, 119334

K. Solntsev

Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences

Email: aogarkov@imet.ac.ru
俄罗斯联邦, Leninskii pr. 49, Moscow, 119334

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