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Thermal expansion of iron carbides, Fe7C3 and Fe3C, at 297-911 K determined by in situ X-ray diffraction. / Litasov, Konstantin D.; Rashchenko, Sergey V.; Shmakov, Alexander N. и др.
в: Journal of Alloys and Compounds, Том 628, 15.04.2015, стр. 102-106.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Thermal expansion of iron carbides, Fe7C3 and Fe3C, at 297-911 K determined by in situ X-ray diffraction
AU - Litasov, Konstantin D.
AU - Rashchenko, Sergey V.
AU - Shmakov, Alexander N.
AU - Palyanov, Yury N.
AU - Sokol, Alexander G.
PY - 2015/4/15
Y1 - 2015/4/15
N2 - The thermal expansion of Fe-carbides Fe7C3 and Fe3C was measured above and below the ferromagnetic transition in a temperature range of 297-911 K by in situ X-ray diffraction enhanced by synchrotron radiation. The coefficient of thermal expansion was estimated as α = a0 + a1T. The results for paramagnetic phases are a0 = 3.1 × 10-5 K-1 and a1 = 1.2 × 10-8 K-2 for Fe7C3 and a0 = 3.9 × 10-5 K-1 and a1 = 1.2 × 10-8 K-2 for Fe3C. The ferromagnetic phases show linear relations with V298K = 371.9 Å3, a0 = 0.91 × 10-5 K-1 and a1 = 0 for Fe7C3 and V298K = 155.2 Å3, a = 0.86 × 10-5 K-1 and a1 = 0 for Fe3C. Our obtained results indicate that the coefficients of thermal expansion, that were calculated by high-pressure equations of state for Fe-carbides, appeared to be high-precision and consistent with the data obtained at 0.1 MPa.
AB - The thermal expansion of Fe-carbides Fe7C3 and Fe3C was measured above and below the ferromagnetic transition in a temperature range of 297-911 K by in situ X-ray diffraction enhanced by synchrotron radiation. The coefficient of thermal expansion was estimated as α = a0 + a1T. The results for paramagnetic phases are a0 = 3.1 × 10-5 K-1 and a1 = 1.2 × 10-8 K-2 for Fe7C3 and a0 = 3.9 × 10-5 K-1 and a1 = 1.2 × 10-8 K-2 for Fe3C. The ferromagnetic phases show linear relations with V298K = 371.9 Å3, a0 = 0.91 × 10-5 K-1 and a1 = 0 for Fe7C3 and V298K = 155.2 Å3, a = 0.86 × 10-5 K-1 and a1 = 0 for Fe3C. Our obtained results indicate that the coefficients of thermal expansion, that were calculated by high-pressure equations of state for Fe-carbides, appeared to be high-precision and consistent with the data obtained at 0.1 MPa.
KW - In situ X-ray diffraction
KW - Iron carbide
KW - Thermal expansion
KW - Thermochemistry
UR - http://www.scopus.com/inward/record.url?scp=84920747309&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2014.12.138
DO - 10.1016/j.jallcom.2014.12.138
M3 - Article
AN - SCOPUS:84920747309
VL - 628
SP - 102
EP - 106
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
ER -
ID: 25728504