Measurements by x-ray diffraction of the temperature dependence of lattice parameter and crystallite size for isostatically-pressed graphite

Measurements by x-ray diffraction of the temperature dependence of lattice parameter and crystallite size for isostatically-pressed graphite
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通过 X 射线衍射测量等静压石墨的晶格参数和微晶尺寸的温度依赖性

DOI:
10.1016/j.cartre.2021.100071
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Hallam K
Hallam K
中科院分区:
--
文献类型:
--
作者:
Hallam K

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各种等级和制造路线的合成多颗粒石墨用于核反应堆中用于发电,并且可以用于潜在的第四代和其他先进的反应堆设计,这些反应堆将在更高的温度下运行。本文研究了孔隙率在8%~ 18%范围内的等静压成型合成多粒石墨。在室温至800°C的温度范围内通过X射线衍射测量了六方石墨的晶格参数a和c。的晶格参数,相干长度(微晶尺寸)和微应变随温度的变化进行了讨论,参考的微观结构和相对强度的键面内和垂直的石墨烯层。
Synthetic polygranular graphites of various grades and manufacturing routes are used in nuclear reactors for power generation, and may be used in potential fourth generation and other advanced reactor designs that will operate at higher temperature. Attention is given in this paper to isostatically-moulded synthetic polygranular graphites with porosities in the range 8% to 18%. The lattice parameters a and c for the hexagonal graphite have been measured over the temperature range from room temperature to 800°C by x-ray diffraction. The variation with temperature of the crystal lattice parameters, coherence length (crystallite size) and microstrain are discussed with reference to the microstructure and the relative strength of the bonds in-plane and normal to the graphene layers.
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