Thermal transformations in ultrafine plasmochemical zirconium dioxide powders
| Parent link: | Journal of Thermal Analysis and Calorimetry Vol. 119, iss. 3.— 2015.— [P. 1603-1609] |
|---|---|
| Ente Autore: | |
| Altri autori: | , , , |
| Riassunto: | Title screen The methods of thermal analysis and X-ray diffraction are used to investigate polymorphic transformations taking place under heating and cooling in nonstabilized ultrafine ZrO2 powders (ZrO2 UFP) synthesized in a plasmochemical process. It is found out that ZrO2 UFP is characterized by an increased content (up to 55 mass%) of tetragonal-phase particles, which is associated with the size effect of its stabilization. Heating of UFP within T = (25–700) °C, which is followed by the release of H2O, CH2O, and CO2, does not result in a change in its structural-phase state, while annealing within the temperature interval T = (700–1,000) °C gives rise to an increased growth of the size of t-ZrO2 crystallites and results in an elevated tetragonality of the crystal lattice (c/a). A complete t-ZrO2 > m-ZrO2 transition occurs as a result of heating the powder up to T = 1,300 °C. The effect of the dimensional factor on temperature characteristics of polymorphic m - t transitions and the value of their temperature hysteresis is established. It is shown that the powder particle size exerts the most pronounced influence on the temperature-dependent position of the point of martensitic transformation M s. As this influence is increased, M s is shifted toward the region of higher temperatures. This is followed by a decreased temperature hysteresis of the m - t martensitic transformations. Режим доступа: по договору с организацией-держателем ресурса |
| Lingua: | inglese |
| Pubblicazione: |
2015
|
| Soggetti: | |
| Accesso online: | http://dx.doi.org/10.1007/s10973-014-4318-x |
| Natura: | Elettronico Capitolo di libro |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=639670 |
MARC
| LEADER | 00000naa0a2200000 4500 | ||
|---|---|---|---|
| 001 | 639670 | ||
| 005 | 20250218113410.0 | ||
| 035 | |a (RuTPU)RU\TPU\network\4158 | ||
| 090 | |a 639670 | ||
| 100 | |a 20150319d2015 k||y0rusy50 ba | ||
| 101 | 0 | |a eng | |
| 102 | |a NL | ||
| 135 | |a drnn ---uucaa | ||
| 181 | 0 | |a i | |
| 182 | 0 | |a b | |
| 200 | 1 | |a Thermal transformations in ultrafine plasmochemical zirconium dioxide powders |f A. P. Surzhikov [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: p. 1609 (17 tit.)] | ||
| 330 | |a The methods of thermal analysis and X-ray diffraction are used to investigate polymorphic transformations taking place under heating and cooling in nonstabilized ultrafine ZrO2 powders (ZrO2 UFP) synthesized in a plasmochemical process. It is found out that ZrO2 UFP is characterized by an increased content (up to 55 mass%) of tetragonal-phase particles, which is associated with the size effect of its stabilization. Heating of UFP within T = (25–700) °C, which is followed by the release of H2O, CH2O, and CO2, does not result in a change in its structural-phase state, while annealing within the temperature interval T = (700–1,000) °C gives rise to an increased growth of the size of t-ZrO2 crystallites and results in an elevated tetragonality of the crystal lattice (c/a). A complete t-ZrO2 > m-ZrO2 transition occurs as a result of heating the powder up to T = 1,300 °C. The effect of the dimensional factor on temperature characteristics of polymorphic m - t transitions and the value of their temperature hysteresis is established. It is shown that the powder particle size exerts the most pronounced influence on the temperature-dependent position of the point of martensitic transformation M s. As this influence is increased, M s is shifted toward the region of higher temperatures. This is followed by a decreased temperature hysteresis of the m - t martensitic transformations. | ||
| 333 | |a Режим доступа: по договору с организацией-держателем ресурса | ||
| 461 | |t Journal of Thermal Analysis and Calorimetry | ||
| 463 | |t Vol. 119, iss. 3 |v [P. 1603-1609] |d 2015 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 701 | 1 | |a Surzhikov |b A. P. |c physicist |c Professor of Tomsk Polytechnic University, doctor of physical and mathematical sciences (DSc) |f 1951- |g Anatoly Petrovich |3 (RuTPU)RU\TPU\pers\30237 |9 14617 | |
| 701 | 1 | |a Gyngazov (Ghyngazov) |b S. A. |c specialist in the field of electronics |c Professor of Tomsk Polytechnic University, Doctor of technical sciences |f 1958- |g Sergey Anatolievich |3 (RuTPU)RU\TPU\pers\33279 |9 17024 | |
| 701 | 1 | |a Frangulyan (Franguljyan) |b Т. S. |c specialist in the field of electronics, dielectrics and semiconductors |c leading researcher of Tomsk Polytechnic University, candidate of physical and mathematical Sciences |f 1940- |g Tamara Semenovna |3 (RuTPU)RU\TPU\pers\33975 |9 17548 | |
| 701 | 1 | |a Vasiljev |b I. P. |c a specialist in the field of electrical engineering |c assistant researcher of Tomsk Polytechnic University |f 1990- |g Ivan Petrovich |3 (RuTPU)RU\TPU\pers\33976 |9 17549 | |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет (ТПУ) |b Институт неразрушающего контроля (ИНК) |b Кафедра физических методов и приборов контроля качества (ФМПК) |3 (RuTPU)RU\TPU\col\18709 |
| 801 | 2 | |a RU |b 63413507 |c 20160226 |g RCR | |
| 856 | 4 | |u http://dx.doi.org/10.1007/s10973-014-4318-x | |
| 942 | |c CF | ||