Multitemperature model of a SPS reactor for the synthesis and densification of zirconium nitride

The model includes the temperature of the solid phase of the mixture of Zr, ZrN, the temperature of the gas phase N2, the temperature of the reactor vessel made of porous graphite and the temperature of the low-resistance layer of tungsten alloy to the elec-trodes of which a potential difference is applied. A model of an SPS spark sintering reac-tor with a gas supply channel is proposed. The operating modes of a reactor with a multi-stage nitrogen flux at the reactor inlet, including the elastic limit with a transition from thermoelasticity model to thermoplasticity one for a porous mixture of solid particles with a gas phase, are investigated. The results are in satisfactory agreement with experi-mental data.

variable porosity, synthesis of zirconium nitride, SPS reactor with gas supply, multitemperature model.

Volume 22, issue 6, 2021 year

Многотемпературная модель SPS реактора синтеза и уплотнения нитрида циркония

Модель включает температуру твердой фазы смеси Zr и ZrN, температуру газовой фазы N2 и температуру корпуса реактора из пористого графита, температуру низ-коомного слоя вольфрамового сплава к электродам которого приложена разность потенциалов. Предложена модель реактора искрового спекания SPS, который со-держит канал для подачи газа Исследованы режимы работы реактора с многоста-дийным потоком азота на входе в реактор, включающие предел упругости с пере-ходом к термопластичности для пористой смеси твердых частиц с газовой фазой, Результаты удовлетворительно согласуются с экспериментальными данными.

Volume 22, issue 6, 2021 year

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