Polycrystalline ZrN1-xCx Layers with (111) Preferred Orientation Prepared by the Carbothermal Nitridation of ZrO2 Ceramics

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abstract

Polycrystalline ZrN1-xCx layers have been prepared by the carbothermal nitridation of consolidated ZrO2 ceramics. Thermodynamic analysis indicates that the formation of ZrN1-xCx, is favored by increasing the reaction temperature and the pressure of N-2. The kinetics in the carbothermal nitridation is studied, and the overall reaction is considered to be controlled by the infiltration and diffusion of gaseous reactants. From the surface to the center, the sample shows a porosity gradient due to the difference in reaction degree. A strong (111) preferred orientation is observed in the as-synthesized ZrN1-xCx layers, which is enhanced as elevated temperatures and higher pressures of N-2. It is proposed that the growth of ZrN1-xCx crystals takes place by the two-dimensional nucleation and growth mechanism.

keywords

THIN-FILMS; MECHANICAL-PROPERTIES; ZRN; ZIRCONIUM; SUBSTRATE; NITROGEN; DEPOSITION; POWDERS; GROWTH; OXIDE

subject category

Chemistry; Crystallography; Materials Science

authors

Liu, GH; Li, JT; Chen, KX; Zhou, HP; Pereira, C; Ferreira, J

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Publication Details

type
Journal Article
year
2009
journal
CRYSTAL GROWTH & DESIGN
volume
9
publisher
AMER CHEMICAL SOC
issn
1528-7483
issue
1
digital object identifier
10.1021/cg8008656
web of science article identifier
WOS:000262332700086

Journal Metrics (JCR 2019)

Journal Impact Factor
4.089
Journal Impact Factor (5 yrs)
3.771
category normalized journal percentile
74.819

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