Изменение пластичности Ag2S при переходе из моноклинной в суперионную кубическую фазу

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Abstract

Температурная зависимость микротвердости Ag2S измерена в области температур перехода из моноклинной в кубическую кристаллическую модификацию. Полученные экспериментальные данные обсуждаются с учетом аномально высокой пластичности этого соединения и суперионной природы его кубической модификации.

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About the authors

Ю. С. Тверьянович

Институт химии Санкт-Петербургского государственного университета

Author for correspondence.
Email: y.tveryanovich@spbu.ru
Russian Federation, Санкт-Петербург

К. С. Кравчук

Технологический институт сверхтвердых и новых углеродных материалов

Email: y.tveryanovich@spbu.ru
Russian Federation, Троицк

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2. Fig. 1. Dependence of the microhardness of glasses of the P-Se system on the reduced temperature: n — Se-based glasses; ˜ — phosphorus-based glasses; p — P-Se glass. Arrows show the direction of increasing phosphorus content in glasses. Experimental data for plotting the graph are taken from [1].

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3. Fig. 2. a – Example of the relationship between the load and the displacement of the indenter during the indentation process. The arrows indicate the direction of change of the parameters over time. b – Schematic representation of indentation. The parameters used in equations (1)–(4) are indicated.

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4. Fig. 3. Temperature dependences of hardness H according to Berkovich (a) and reduced modulus of elasticity E *r (b). Red triangles are the results of measurements during heating, black circles are the same during cooling.

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5. Fig. 4. a – Temperature dependence of plasticity of Ag2S. b – Temperature dependence of the inverse value of elasticity of Ag2S.

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