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Your search keyword '"M. S. Boldin"' showing total 7 results
Start Over Author "M. S. Boldin" Topic general chemical engineering
7 results on '"M. S. Boldin"'

2. Preparation of Si2N2O Ceramics by Spark Plasma Sintering

Author

L. S. Alekseeva, P. V. Andreev, P. D. Drozhilkin, M. S. Boldin, K. E. Smetanina, A. A. Murashov, K. O. Karazanov, and G. V. Shcherbak

Subjects
Inorganic Chemistry, General Chemical Engineering, Materials Chemistry, Metals and Alloys
Published
2022

6. Synthesis, temperature behavior, and hydrolytic stability of Na-Zr and Ca-Zr phosphate molybdates and phosphate tungstates

Author

M. E. Karaeva, D. O. Savinykh, A. I. Orlova, S. A. Khainakov, M. S. Boldin, A. A. Popov, A. V. Nokhrin, S. Garcia-Granda, and V. N. Chuvil’deev

Subjects
Inorganic Chemistry, Ceramics, Hydrolytic stability, X-ray diffraction characterization, General Chemical Engineering, Spark plasma sintering, Materials Chemistry, Metals and Alloys, Powders, Thermal expansion, Phosphates, NZP structure
Abstract

We have synthesized Na1 ¿ xZr2(PO4)3 ¿ x(¿O4)x and ¿a0.5 ¿ xZr2(PO4)3 ¿ x(¿O4)x (X = Mo, W; 0 ¿ x ¿ 0.5) compounds with the NZP structure. Their thermal expansion has been studied in the temperature range 25¿800°C using high-temperature X-ray diffraction and shown to have a tendency to decrease as the occupancy of the extraframework sites in their structure decreases. Ceramic samples with a relative density above 97.5% have been prepared from the synthesized phosphate molybdates and phosphate tungstates by spark plasma sintering. Their strength characteristics (microhardness and fracture toughness) have been determined and they have been characterized by hydrolytic stability tests.

Published
2022

7. A comparative study of the hot pressing and spark plasma sintering of Al2O3–ZrO2–Ti(C,N) powders

Author

V. N. Chuvil’deev, S. S. Ordan’yan, V. Rumyantsev, M. S. Boldin, and Ya. G. Dyatlova

Subjects
Inorganic Chemistry, Slow heating, Materials science, General Chemical Engineering, Powder metallurgy, Kinetics, Metallurgy, Materials Chemistry, Metals and Alloys, Spark plasma sintering, Hot pressing, Sintering kinetics
Abstract

We have studied the sintering kinetics of Al2O3–ZrO2–Ti(C,N) powders during hot pressing and spark plasma sintering. The results demonstrate that, at slow heating rates and under identical hot pressing and spark plasma sintering conditions, the consolidation processes have identical kinetics in the active densification stage and are characterized by identical activation energies.

Published
2015

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