Influence of stoichiometry on the oxidation behavior and mechanical properties of hafnium carbonitride ceramics; Ceramics International; Vol. 52, iss. 9

Influence of stoichiometry on the oxidation behavior and mechanical properties of hafnium carbonitride ceramics; Ceramics International; Vol. 52, iss. 9

Detalles Bibliográficos
Parent link:Ceramics International.— .— Amsterdam: Elsevier Science Publishing Company Inc.
Vol. 52, iss. 9.— 2026.— P. 11270-11280
Outros autores: Kuzmenko E. D. Egor Dmitrievich, Matrenin S. V. Sergey Veniaminovich, Nassyrbayev (Nasyrbaev) A. Artur, Ditts A. A. Aleksander Andreevich
Summary:Title screen
HfCN ceramics were produced using commercial hafnium carbide and hafnium nitride powders via spark plasma sintering at 2000 °C. By varying the ratios of the starting powders, samples with varying HfCxNy stoichiometry were obtained. Hafnium carbonitride formation was determined to begin at 1347 °C. An increase in the C/(C + N) ratio resulted in an increase in the mechanical properties of the materials, achieving the following values: hardness of 22.3 GPa, Young's modulus of 488 GPa, strength of 683 MPa, and fracture toughness of 7.4 MPa∙m1/2. A study of the oxidative behavior of the materials revealed that an increase in the carbon content in the samples also increased their oxidation resistance. The samples withstand oxidation at 1200 °C for 1 h with Δm/ΔS not exceeding 160 g/cm2. After oxidation, a dense oxide film 170–470 μm thick forms on the surface of the samples. This film consists of a monoclinic modification of hafnium dioxide containing carbon and nitrogen atoms diffused from the material matrix
Текстовый файл
AM_Agreement
Idioma:inglés
Publicado: 2026
Subjects:
электронный ресурс
труды учёных ТПУ
Hafnium carbonitride
Oxidation resistance
Mechanical properties
Spark plasma sintering
C/N ratio
Acceso en liña:https://doi.org/10.1016/j.ceramint.2026.01.289
Formato: Electrónico Capítulo de libro
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=686483

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