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Characterization of Microstructure and Stability of Precipitation in SIMP Steel Irradiated with Energetic Fe Ions
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作者 方雪松 申铁龙 +4 位作者 崔明焕 金鹏 李炳生 朱亚滨 王志光 《Chinese Physics Letters》 SCIE CAS CSCD 2017年第11期57-60,共4页
A type of home-made reduced activation martensitic steel, high silicon (SIMP) steel, is homogeneously irradiated with energetic Fe ions to the doses of 0.1, 0.25 and 1 displacement per atom (dpa), respectively, at... A type of home-made reduced activation martensitic steel, high silicon (SIMP) steel, is homogeneously irradiated with energetic Fe ions to the doses of 0.1, 0.25 and 1 displacement per atom (dpa), respectively, at 300℃ and i dpa, at 400℃. MicrostructurM changes are investigated in detail by transmission electron microscopy with cross-section technique. Interstitial defects and defect dusters induced by Fe-ion irradiation are observed in ali the specimens under different conditions. It is found that with increasing irradiation temperature, size of defect clusters increases while the density drops quickly. The results of element chemical mapping from the STEM images indicate that the Si element enrichment and Ta element depletion occur inside the precipitates in the matrix of SIMP steel irradiated to a dose of 1 dpa at 300℃. Correlations between the microstructure and irradiation conditions are briefly discussed. 展开更多
关键词 Characterization of Microstructure and Stability of Precipitation in SIMP Steel Irradiated with Energetic Fe ions FE
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Comparative TEM investigation on the precipitation behaviors in Cu-15wt% Sn alloy 被引量:2
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作者 Zeng-Jie Wang Konno J. Toyohiko Chao-Li Ma 《Rare Metals》 SCIE EI CAS CSCD 2013年第2期139-143,共5页
The decomposition and precipitation behaviors of a quenched Cu-15wt%Sn alloy as a function of aging temperature were investigated using transmission electron microscopy (TEM). Focused ion beam (FIB) was employed t... The decomposition and precipitation behaviors of a quenched Cu-15wt%Sn alloy as a function of aging temperature were investigated using transmission electron microscopy (TEM). Focused ion beam (FIB) was employed to assist TEM specimen preparation. At 300 ℃, the decomposition of the supersaturated phase occurred at grain boundaries, displaying a cellular morphology. The lamellae were found with and phases, rather than with the equilibrium e and phases. The and phases exhibit a welldefined orientation relationship (OR) as On the other hand, at 320 ℃, only incipient lamellar structures of several micron meters were observed, which were composed of the 6 and phases. At the same time, abundant intragranular precipitation of the e phase in the form of platelets was observed, and OR as (lil)J/ (001), [110] J/[100] exists between e phase and the ct phase. These contrasting precipitation behaviors are discussed from the viewpoint of crystallographic coherency of these phases. 展开更多
关键词 Cu-Sn alloy Precipitation behaviorsFocused ion beam (FIB) TEM CRYSTALLOGRAPHY
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An evaluation of quality assurance to monitor acid precipitation by using ion balance in Guizhou,China
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作者 Kang Demeng(Research Center for Eco- Environniental Sciences. ChineseAcademy of Sciences. Beijing100085 . China) 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 1995年第3期368-373,共6页
AnevaluationofqualityassurancetomonitoracidprecipitationbyusingionbalanceinGuizhou,ChinaKangDemeng(ResearchC... AnevaluationofqualityassurancetomonitoracidprecipitationbyusingionbalanceinGuizhou,ChinaKangDemeng(ResearchCenterforEco-Envir... 展开更多
关键词 acid precipitation: ion balance quality assurance.
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