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1.
The isothermal section of the Co-Ni-Ti system at 850 °C was determined by using diffusion couple specimens and equilibrated
alloys, which were analyzed by optical microscopy, X-ray diffraction (XRD), and electron probe microanalysis (EPMA) techniques.
This isothermal section consists of 9 single-phase regions, 12 two-phase regions, and 4 three-phase regions. The 9 single-phase
regions include αTi solid solution, βTi solid solution, Ti2(Co, Ni), Ti(Co, Ni), fcc-(Co, Ni) solid solution, and solid solutions based on TiCo2(hexagonal), TiCo2(cubic), TiCo3, and TiNi3. No ternary Co-Ni-Ti compound was found. 相似文献
2.
X. T. Wang G. L. Chen K. Q. Ni S. M. Hao 《Journal of Phase Equilibria and Diffusion》1998,19(3):200-205
The 1400‡C isothermal section of Ti-Al-Nb system was determined using the diffusion couple technique, along with optical microscopy
and electron probe microanalysis (EPMA). Equilibrated alloys were employed to identify the phase regions using XRD. The isothermal
section consists of seven single-phase regions including Β(ΒTi,Nb), α(αTi), γ(TiAl), η((Ti,Nb)Al3), σ(Nb2Al), δ(Nb3Al), and γ1. The detailed studies on the γ31 phase were made by XRD, DTA, and DSC. 相似文献
3.
Wei He Yunhong ZhaoYongzhi Zhang Meihua YuLingmin Zeng 《Journal of Alloys and Compounds》2011,509(3):632-635
The 773 K isothermal section of the phase diagram of the Ho-Co-Fe ternary system was investigated by using X-ray diffraction technique, metallographic analysis and scanning electron microscopy with energy dispersive analysis. The isothermal section of the ternary system consists of 6 three-phase regions, 16 two-phase regions and 11 single-phase regions. Three pairs of corresponding compounds of Ho-Co and Ho-Fe systems, i.e., Ho2Co17 and Ho2Fe17, HoCo3 and HoFe3, HoCo2 and HoFe2, form a continuous series of solid solution. At 773 K the compound Ho6Fe23−xCox was found to have a wide homogeneity range from 0 to 29 at.% Co. The maximum solid solubilities of Fe in Co, Ho2Co7, Ho12Co7 and Ho3Co were determined to be about 10, 9, 2 and 5 at.% Fe, respectively. The maximum solid solubility of Co in Fe is found to be 78 at.% Co. 相似文献
4.
Jichao Jiang Yongzhong Zhan Zan Sun Dan Peng Guanghua Zhang 《Journal of Alloys and Compounds》2009,482(1-2):127-130
The phase equilibria of the Ti–Co–Zr ternary system at 773 K have been investigated mainly by powder X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive analysis (EDX). The isothermal section consists of 16 single-phase regions, 31 two-phase regions and 16 three-phase regions. There are 11 binary compounds, i.e. CoZr3, CoZr2, CoZr, Co2Zr, Co23Zr6, Co11Zr2, TiCo3, h-TiCo2, c-TiCo2, TiCo, Ti2Co in the system. The existence of two ternary compounds Co10Ti7Zr3 and Co66Ti17Zr17 has been confirmed at 773 K. Co2Zr, CoZr3 and TiCo have a range of homogeneity. The solubilities of Ti in CoZr was determined to be up to 8.1 at.% Ti. 相似文献
5.
The phase relationships in the Pr-Si-Zr ternary system at 773 K have been investigated mainly by means of X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and differential thermal analysis (DTA). 9 binary compounds, i.e. Pr5Si3, Pr5Si4, PrSi, PrSi2, ZrSi2, ZrSi, Zr5Si4, Zr3Si2 and Zr2Si were confirmed. The isothermal section of the Pr-Si-Zr ternary system at 773 K consists of 12 single-phase regions, 21 two-phase regions and 10 three-phase regions. None of the intermediate compound phases in this system exhibits a remarkable solid solution range at 773 K. 相似文献
6.
The 673 and 1123 K isothermal sections (partial) of the phase diagram of the Ce–Mg–Ni ternary system
《Journal of Alloys and Compounds》2006,407(1-2):129-131
The 673 and 1123 K isothermal sections (partial) of the phase diagram of the Ce–Me–Ni ternary system were investigated by powder X-ray diffraction (XRD), differential thermal analysis (DTA), optical microscopy and scanning electron microscopy (SEM) techniques. The (Ce-poor part) 673 K isothermal section consists of 11 single-phase regions, 21 two-phase regions and 11 three-phase regions. The (Ni-rich part) 1123 K isothermal section consists of 8 single-phase regions, 14 two-phase regions and 7 three-phrase regions. No apparent solid solubility was detected in this work. 相似文献
7.
The 773K isothermal section of the Gd-Ni-Ti system was investigated b X-ray diffractometry,optical microanalysis and electron probe microanalysis techniques.The results show that it consists of 13 single-phase regions,23 two-phase regions and 11 three-phase regions.The maximum solid solubility of Ti in Ni,Gd2Ni17,GdNi5 and Gd2Ni7 are 6.0%,3.0%,3.0%,and 2.5(mole fraction).respectively. 相似文献
8.
Wei He Yongzhi Zhang Yunhong Zhao Lingmin Zeng 《Journal of Alloys and Compounds》2011,509(5):1590-1594
The isothermal section of the phase diagram of the Co-Er-Y ternary system at 500 °C was investigated by X-ray powder diffraction technique, differential thermal analysis, scanning electron microscopy with energy dispersive analysis and optical microscopy. The 500 °C isothermal section consists of 14 single-phase regions, 19 two-phase regions, and 6 three-phase regions. Six pairs of corresponding compounds Er2Co17 and Y2Co17, Er2Co7 and Y2Co7, ErCo3 and YCo3, ErCo2 and YCo2, Er4Co3 and Y4Co3, Er3Co and Y3Co and metals Y and Er form a continuous series of solid solutions. The maximum solid solubility of Y in the compounds Er12Co7 is about 19 at.% Y. 相似文献
9.
《Journal of Alloys and Compounds》2002,330(1-2):91-93
The isothermal section of the phase diagram of the ternary system Dy–Mn–Ni system at 803 K was investigated by powder X-ray diffraction (XRD), differential thermal analysis (DTA), optical microanalysis and electron probe microanalysis techniques. It consists of 13 single-phase regions, 22 two-phase regions and 10 three-phase regions. At 803 K, the maximum solid solubilities of Mn in Ni, Dy2Ni17, DyNi5, Dy2Ni7, DyNi3, DyNi, Dy3Ni2 and Dy3Ni are about 31at.% Mn, 6 at.% Mn, 5.5 at.% Mn, 3 at.% Mn, 5 at% Mn, 5 at.% Mn, 3 at.% Mn and 1.5 at.% Mn, respectively. The maximum solid solubilities of Ni in Mn, DyMn12 and Dy6Mn23 are about 2.6 at.% Ni, 2 at.% Ni and 4 at.% Ni, respectively. DyMn2 and DyNi2 form a continous solid solution in this system. The binary compounds DyNi4 and Dy4Ni17 were not observed in this work. The existence of any ternary compound was not observed. 相似文献
10.
Assessment of Co-Cr-Ni ternary system by CALPHAD technique 总被引:1,自引:0,他引:1
The Co-Cr-Ni ternary system was critically assessed using the CALPHAD technique.The solution phases including the liquid,γ(Co,Ni),εCo and αCr phases were described by a substitutional solution model.The σ phase was characterized by a three-sublattice model of (Co,Ni)8Cr4(Co,Cr,Ni)18 in order to reproduce its homogeneity range determined by experiments.A self-consistent set of thermodynamic parameters for each phase was derived. 相似文献