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| 1 | Development of Bi-base high-temperature Pb-free solders with second-phase dispersion: Thermodynamic calculation, microstructure, and interfacial reaction显示文摘 | Yoshikazu Takaku Ikuo Ohnuma Ryosuke Kainuma Yasushi Yamada Yuji Yagi Yuji Nishibe Kiyohito Ishida | 2006 | Journal of Electronic Materials2006，，11： | 1 |
| 2 | Development of thermodynamic and kinetic databases in micro-soldering alloy systems and their applications | Ikuo OHNUMA Ryosuke KAINUMA Kiyohito ISHIDA | 2011 | Progress in Natural Science:Materials International2011，21，2： | 1 |
| 3 | Morphology of sulfide formed in the Fe-Cr-S ternary alloys显示文摘 | Hajime Mitsui Katsunari Oikawa Ikuo Ohnuma | 2002 | ISIJ International2002，42，11： | 1 |
| 4 | Development of Bi-base high-temperature Pb-free solders with second-phase dispersion: Thermodynamic calculation, microstructure, and interfacial reaction显示文摘 | Yoshikazu Takaku Ikuo Ohnuma Ryosuke Kainuma Yasushi Yamada Yuji Yagi Yuji Nishibe Kiyohito Ishida | 2006 | Journal of Electronic Materials2006，，11： | 1 |
| 5 | Phase equilibria in the Fe-Co binary system显示文摘 | Hirotoshi Enoki Osamu Ikeda | 2002 | Acta Materialia2002，50，2： | 1 |
| 6 | Thermodynamic calculation of phase equilibria of the Bi-Sn-Zn system显示文摘 | Dmitri V. Malakhov Xing Jun Liu Ikuo Ohnuma Kiyohito Ishida | 2000 | Journal of Phase Equilibria2000，，6： | 1 |
| 7 | Abnormal Grain Growth Induced by Cyclic Heat Treatment显示文摘 | Toshihiro Omori Tomoe Kusama Shingo Kawata Ikuo Ohnuma Yuji Sutou Yoshikazu Araki Kiyohito Ishida Ryosuke Kainuma | 2013 | 2013 (6153)2013，，6153： | 1 |
| 8 | An assessment of the entire A1-Fe system including D03 ordering显示文摘 | Sundman t3o Ohnuma Ikuo Dupin Nathalie | 2009 | Acta Materialia2009，57，10： | 1 |
| 9 | Thermodynamic assessment of the Ni-Sb binary system显示文摘The Ni-Sb binary alloy system was thermodynamically assessed using CALPHAD approach in this article. Excess Gibbs energies of solution phases, liquid and fcc phases, were formulated using the Redlich-Kister expression. The intermediate phases were modeled by the sublattice model with (Ni,Va)0.5(Ni,Sb)0.25(Ni)0.25 for Ni3Sb_HT phase and (Ni,Va)0.3333(Sb)0.3333(Ni,Va)0.3333 for NiSb phase. The other phases including Ni3Sb, Ni7Sb3, and NiSb2 were treated as stoichiometric compound owing to their narrow composition ranges. Based on the reported ther-modynamic properties and phase diagram data, the thermodynamic parameters of these phases were optimized, and the obtained values can reproduce the available experimental data well. | CAO Zhanmin TAKAKU Yoshikazu OHNUMA Ikuo KAINUMA Ryosuke ZHU Hongmin ISHIDA Kiyohito | 2008 | Rare Metals2008，27，4： | 1 |
| 10 | An assessment of the entire Al–Fe system including D0 3 ordering显示文摘 | Bo Sundman Ikuo Ohnuma Nathalie Dupin Ursula R. Kattner Suzana G. Fries | 2009 | Acta Materialia2009，，： | 1 |
| 11 | Development of materials design tool and its application in Pb-free micro-solders in electronic package显示文摘A materials design tool for developing Pb-free soldering alloys in electronic package was developed based on comprehensive experimental data of phase equilibria and thermodynamic properties data accumulated with the CALPHAD (calculation of phase diagrams) method and contains 10 elements,namely,Ag,Au,Bi,Cu,In,Ni,Sb,Sn,Zn and Pb.It can handle the calculation of phase diagrams in all combinations of these elements and all composition ranges.In addition,based on this tool,the liquidus,solidus,phase fractions and constitutions,equilibrium and non-equilibrium solidification behavior,surface tension and viscosity of liquid,diffusion reactions and microstructural evolution,etc.can be predicted.Typical examples of the calculation and application of this tool are presented.The design tool is expected to be a powerful tool for the development of Pb-free solders,as well as for promoting the understanding of the interfacial phenomena between Cu substrate and Pb-free solders in electronic packaging technology. | OHNUMA Ikuo KAINUMA Ryosuke ISHIDA Kiyohito CHANG Austin Y. | 2010 | Science China(Technological Sciences)2010，53，6： | 0 |
| 12 | Thermodynamic reassessment of Ni–Ga binary system显示文摘New experimental measurements of the phase diagram and the mixing enthalpy of liquid phase along with the previous experimental data were used in a reassessment of the Ni-Ga system.A set of self-consistent thermodynamic parameters of the Ni-Ga system is obtained using the calculation of phase diagram(CALPHAD) technique,and the available phase diagram and thermodynamic data are reproduced well within experimental error limits.Some noticeable improvements are obtained in the present work compared with the previous assessment:(1) the calculated Ga-rich liquidus is more reasonable;(2) Ni_3Ga_7 is adopted as the most Ga-rich compound rather than NiGa_4;(3) the Ni_5Ga_3 phase is treated as the nonstoichiometric compound with consideration of its narrow homogeneity range;(4) the phase transformation between B8_(1.5)_Ni_3Ga_2 and Ni_(13)Ga_9 is considered instead of treating them as Ni_3Ga_2 phase simply;(5) the latest experimental data of mixing enthalpy for the liquid phase are adopted.The present study can be used as a basis for the development of a thermodynamic database of the Ni-based semiconductor alloy systems. | Zhan-Min Cao Xian Shi Wei Xie Ikuo Ohnuma Kiyohito Ishida Zhi-Yu Qiao | 2015 | Rare Metals2015，34，12： | 0 |
| 13 | Miscibility gap and stability of B2 phase in the Co-Al based ternary systems显示文摘Information on phase equilibria in the Co-Al based systems which are related to some magnetic and heat resistance materials is important for their microstructural control. Recently, it was proposed with a theoretical calculation on electronic band structure that some Heusler-type alloys Co2XAl (X: Cr and Mn) should be a new type of spinelectronic materials so-called half-metallic ferromagnet. In the case of the Co2CrAl, however, magnetic properties expected from the theoretical work can not been experimentally obtained and the reason has been still unknown. On the other hand, a tunneling magnetoresistance (TMR) effect due to the half-metallic properties was reported in Co2(Cr0.6 Fe0.4 )Al alloy, but not the Co2CrAl alloy.In the present paper, it is reported that this discrepancy with the theoretical work in the Co2CrAl alloy is bought about by phase separation between A2 and B2 phases, and that the substitution of Fe for Cr can suppress the precipitation of A2 phase in the B2 phase. Such a phase separation is originally due to the miscibility gap between CoAl and Cr formed in the Co-Al-Cr ternary system as well as that reported by Hao et al. in the Ni-Co-Al-Fe system. | 贝沼亮介 KOBAYASHI Kosei OHNUMA Ikuo ISHIDA Kiyohito | 2005 | 材料与冶金学报2005，4，2： | 0 |
| 14 | Design of Pb-free solders in electronic packaging by computational thermodynamics and kinetics显示文摘Computational thermodynamics and kinetics were used to design the Pb-free micro-solders for replacing the conventional Sn-Pb solders because of the health and environmental safety problem. On the basis of CALPHAD (Calculation of Phase Diagrams) method we can easily calculate properties such as the liquidus projection, isothermal and vertical sectional diagrams and phase fraction in multi-component system including Ag, Bi, Cu, In, Sb, Sn, Zn and Pb elements. In addition, other related information such as the surface tension, viscosity of the liquid phase and solidification simulation can also be obtained. DICTRA (Diffusion Controlled Transformation) software was used to simulate the interfacial reactions between substrate and Pb-free solders, which can easily give the information on the growth of intermetallic compounds and moving speed of interface between substrate and solders etc. | 刘兴军 OHNUMA Ikuo KAINUMA Ryosuke ISHIDA Kiyohito | 2005 | 材料与冶金学报2005，4，2： | 0 |
| 15 | Design and development of the self-assemble Cu-Fe base composites显示文摘The Cu-Fe base alloys with liquid immiscible were prepared by gas atomization technique and conventional solidification process, the self-assemble composite microstructures in powders and bulk materials can be obtained under gravity conditions, respectively, and the minor liquid phase always forms the center of composite microstructure. It is shown that the formation of the core-type macroscopic morphology is strongly connected with the existence of a stable miscibility gap of the liquid phase in the Cu-Fe base alloys. This result can be explained by a mechanism that the minor droplets as the second phase are forced to move into the thermal center due to Marangoni motion, which is caused by the temperature dependence of interfacial energy between two liquid phases. | 王翠萍 OHNUMA Ikuo KAINUMA Ryosuke ISHIDA Kiyohito | 2005 | 材料与冶金学报2005，4，2： | 0 |
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