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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">alternative</journal-id><journal-title-group><journal-title xml:lang="ru">Альтернативная энергетика и экология (ISJAEE)</journal-title><trans-title-group xml:lang="en"><trans-title>Alternative Energy and Ecology (ISJAEE)</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1608-8298</issn><publisher><publisher-name>Международный издательский дом научной периодики "Спейс</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.15518/isjaee.2017.19-21.106-115</article-id><article-id custom-type="elpub" pub-id-type="custom">alternative-1124</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>КОНСТРУКЦИОННЫЕ  МАТЕРИАЛЫ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>STRUCTURAL MATERIALS</subject></subj-group></article-categories><title-group><article-title>НАНО- И МИКРОЧАСТИЦЫ HfB2: КОЭФФИЦИЕНТ ТЕРМИЧЕСКОГО РАСШИРЕНИЯ И ЕГО АНИЗОТРОПИЯ</article-title><trans-title-group xml:lang="en"><trans-title>NANO AND MICROPARTICLES of HfB2: THERMAL-EXPANSION COEFFICIENT AND ITS ANISOTROPY</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ковалев</surname><given-names>Д. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Kovalev</surname><given-names>D. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. техн. наук, заведующий лабораторией рентгеноструктурных исследований</p></bio><bio xml:lang="en"><p>Ph.D. (engineering), Head of X-ray Diffraction Researches Laboratory</p></bio><email xlink:type="simple">kovalev@ism.ac.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шилкин</surname><given-names>С. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Shilkin</surname><given-names>S. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. хим. наук, ведущий научный сотрудник, руководитель группы наноразмерных пленок и порошков</p></bio><bio xml:lang="en"><p>Ph.D. (chemistry), Leading Researcher, Head of the group of Nanosized Films and Powders</p></bio><email xlink:type="simple">ssp@icp.ac.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Коновалихин</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Konovalikhin</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. хим. наук, старший научный сотрудник</p></bio><bio xml:lang="en"><p>Ph.D. (chemistry), Senior Scientist</p></bio><email xlink:type="simple">kovalev@ism.ac.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Калинников</surname><given-names>Г. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kalinnikov</surname><given-names>G. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. хим. наук, старший научный сотрудник</p></bio><bio xml:lang="en"><p>Ph.D. (chemistry), Senior Scientist</p></bio><email xlink:type="simple">ssp@icp.ac.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Коробов</surname><given-names>И. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Korobov</surname><given-names>I. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. хим. наук, старший научный сотрудник</p></bio><bio xml:lang="en"><p>Ph.D. (chemistry), Senior Scientist</p></bio><email xlink:type="simple">ssp@icp.ac.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кравченко</surname><given-names>С. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Kravchenko</surname><given-names>S. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>научный сотрудник</p></bio><bio xml:lang="en"><p>Researcher</p></bio><email xlink:type="simple">ssp@icp.ac.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хоменко</surname><given-names>Н. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Chomenko</surname><given-names>N. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>младший научный сотрудник</p></bio><bio xml:lang="en"><p>Junior Researcher</p></bio><email xlink:type="simple">kovalev@ism.ac.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Андриевский</surname><given-names>Р. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Andrievski</surname><given-names>R. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д-р техн. наук, профессор, главный научный сотрудник</p></bio><bio xml:lang="en"><p>D.Sc. (engineering), Professor, Chief Researcher</p></bio><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт структурной макрокинетики и проблем материаловедения Российской академии наук</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт проблем химической физики Российской академии наук</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Problems of Chemical Physics, Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Институт проблем химической физики РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Problems of Chemical Physics, Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>15</day><month>10</month><year>2017</year></pub-date><volume>0</volume><issue>19-21</issue><fpage>106</fpage><lpage>115</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Международный издательский дом научной периодики "Спейс, 2017</copyright-statement><copyright-year>2017</copyright-year><copyright-holder xml:lang="ru">Международный издательский дом научной периодики "Спейс</copyright-holder><copyright-holder xml:lang="en">Международный издательский дом научной периодики "Спейс</copyright-holder><license xlink:href="https://www.isjaee.com/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://www.isjaee.com/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://www.isjaee.com/jour/article/view/1124">https://www.isjaee.com/jour/article/view/1124</self-uri><abstract><p>Рассматривался вопрос о влиянии размерного фактора на коэффициент термического расширения (КТР) диборида гафния. Методом высокотемпературной рентгенографии проведены измерения параметров кристаллической решетки нано- и микрокристаллического диборида гафния в температурном интервале 300– 1 500 K. Размер областей когерентного рассеяния нанокристаллического HfB2 составил 15 нм и оставался постоянным при нагреве. Анализ температурной зависимости параметров нано- и микрокристаллического HfB2 показал, что метрика ячейки увеличивалась с ростом температуры нелинейно. Впервые определены КТР расширения нано- и микрокристаллического HfB2 в направлении кристаллографических осей a и c. Получены аналитические выражения температурной зависимости параметров ячейки нано- и микрокристаллического HfB2 в виде полиномов 2 степени. При линейной аппроксимации температурной зависимости параметров решетки, то есть при отсутствии температурной зависимости КТР в исследуемом диапазоне температур, КТР микрокристаллического HfB2 составил: αa = 7,37 · 10–6 и αс = 7,48 · 10–6 K –1 для осей 0a и 0c соответственно. КТР микрокристаллического HfB2, рассчитанный по рентгеноструктурным данным, соответствует определенному дилатометрическим методом КТР – α = 7,49 · 10-6 K -1 . При линейной аппроксимации температурной зависимости параметров решетки КТР нанокристаллического HfB2 составил: αa = 7,40 ·10–6 и αс = 9,88 · 10–6 K –1 для осей 0a и 0c соответственно. Результаты работы показали, что HfB2 в нанокристаллическом состоянии обладает большим КТР по сравнению с микрокристаллическим аналогом. Выявленные различия КТР нано- и микрокристаллического HfB2 связаны с повышением поверхностной энергии материала при увеличении дисперсности. Обнаружена анизотропия термического расширения как микро-, так и нанокристаллического HfB2 – KTР по оси 0c выше, чем в направлении оси 0a. Анизотропия КТР объясняется исходя из анализа длины и характера связей в кристаллической структуре HfB2. Существенная анизотропия КТР для наноразмерного HfB2 указывает на преимущественный рост ангармонизма атомных колебаний в нанокристаллах в направлении оси 0c. Полученные результаты могут быть использованы при создании новых экологически чистых материалов для нужд альтернативной энергетики.</p><p> </p></abstract><trans-abstract xml:lang="en"><p>The paper deals with the influence of a dimension factor on the thermal-expansion coefficient (TEC) of hafnium diboride. Nano-sized and microcrystalline hafnium diboride is investigated by method of X-ray diffraction in the temperature range of 300–1500 K. The size of nanocrystal HfB2 with coherent scattering is 15 nanometers and remained constant during heating. The analysis of temperature dependence of the nano and microcrystalline HfB2 parameters shows the non-linear growth of the cell metrics with increase in temperature. For the first time, the TEC of nano and microcrystalline HfB2 in the directions of crystallographic axes a and c are defined. The analytical expressions of temperature dependences of nano and microcrystalline HfB2 of the cell parameters are received in the form of 2 degree polynomials. At the linear approximation of temperature dependence of the lattice parameters (i.e. at lack of temperature dependence of TEC), the TEC of microcrystalline HfB2 in the studied temperature range are αa = 7.37 · 10–6 and αс = 7.48 · 10–6 K –1 for axes 0a and 0c respectively. The TEC of microcrystalline HfB2 calculated according to X-ray diffraction data corresponds to TEC calculated by a dilatometric technique α = 7.49 · 10–6 K –1 . At linear approximation of temperature dependence of the lattice parameters, the TEC of the nanocrystal HfB2 are αa = 7.40 · 10–6 and αс = 9.88 · 10–6 K –1 for axes 0a and 0c respectively. The paper shows that the TEC of HfB2 in nanocrystalline state is greater than the TEC of microcrystalline one. The difference between the TEC of nano and microcrystalline HfB2 are bound with increase in the surface energy of material with increase in dispersion. The paper finds the anisotropy of thermal expansion both micro and nanocrystal HfB2. The TEC on the axis 0c is higher than the TEC on the axis 0a. The anisotropy of TEC is explained taking into account the lengths and the nature of interconnections in crystalline structure of HfB2. The essential anisotropy of TEC in nanodimensional HfB2 indicates the domination of the atomic fluctuations anharmonicity growth in nanocrystals in the direction of the axis 0c. The results obtained can be employed to create new environmentally friendly materials for the needs of alternative power engineering.</p><p> </p></trans-abstract><kwd-group xml:lang="ru"><kwd>диборид гафния</kwd><kwd>наноразмерные частицы диборида гафния</kwd><kwd>микрокристаллические частицы диборида гафния</kwd><kwd>высокотемпературная рентгенография</kwd><kwd>коэффициент термического расширения</kwd><kwd>анизотропия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>hafnium diboride</kwd><kwd>nano-sized particles of hafnium diboride</kwd><kwd>microcrystalline particles of hafnium diboride</kwd><kwd>high temperature x-ray diffraction</kwd><kwd>thermal-expansion coefficient</kwd><kwd>anisotropy</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Simonenko, E.P. Promising Ultra High Temperature Ceramic Materials for Aerospace Applications [Text] / E.P. 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