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Isothermal nanocrystallization behavior of bulk metallic glass composites in supercooled liquid regionXiang-Yun Zhang,Zi-Zhou Yuan,Xue-Lei Feng,Li-Zhi Cui,Duan-Xian LiState Key Laboratory of Advanced...-sized(20-50 nm) Al3Zr crystals were synthesized by copper mold suction casting method. The isothermal crystallization of Cu40Zr44Ag8Al8 BMGCs in the supercooled liquid region was studied......
automatic transformation recording/measuring instrument) and X-ray diffraction(XRD) method. The deformation behavior of the alloy at various heating rates in the supercooled liquid region was studied. The results show that the glass transition temperature of the alloy increases slightly and the supercooled liquid region(SLR) increases significantly with increasing heating rate. The deformation......
and evolution of bcc phase are closely dependent on the initial temperature and structure. During the simulation time scale, when the initial temperature is in the range of supercooled liquid region... relaxation process of the supercooled and glassy Pb, and the metastable bcc phase plays an important role in the precursor of crystallization. Key words: supercooling liquid; amorphous metal Pb; isothermal......
Effect of Ti addition on supercooled liquid region and glass forming ability of bulk amorphous Zr60Cu20Ni10-xAl10Tix alloysXING Da-wei(邢大伟), SUN Jian-fei(孙剑飞),LIU Yu-qiang(刘玉强),WANG Gang(王 刚), YAN... Zr60Cu20Ni10-xAl10Tix(x=1, 2, 3, 4, 5) is studied. The results show that the width of the supercooled liquid region ΔTx is enlarged when a small amount (1%-2%) of Ni is replaced by Ti , but minimized......
or occurs in supercooled melts. The liquid phase separation of Cu-Co, Cu-Fe and Cu-Co-Fe systems have been studied in detail by CAO et al[14,15], ROBINSON et al[19], ELDER et al[20] and SUN et al[16-18... Liquid phase separation of Cu-Cr alloys during rapid cooling SUN Zhan-bo(孙占波), WANG You-hong(王宥宏), GUO Juan(郭 娟) School of Science, Xi’an Jiaotong University, Xi’an 710049, China Received 10......
process. Key words: ZrTiCuNiBe amorphous alloy; bulk amorphous alloy; supercooled liquid phase region; hydrostatic extrusion; plastic deformation 大块非晶合金BMG(Bulk metallic glass 或者Bulk... alloy in supercooled liquid region by hydrostatic extrusion ZHANG Shu-guang1, HU Jie2, ZHU Xue-xin1, WANG Fa-dong1, 3,XU Jun1, SHI Li-kai1 (1. National Engineering Research Center for Nonferrous......
, Alloy UH had longer onset time within a rather large supercooled temperature range. Phase precipitation corresponding to the main-crystallization peak of Zr65Cu27.5Al7.5 alloy was retarded... above TC, oxygen diffused fast because of the low viscosity of supercooled liquid. Oxygen-enriched regions suitable for I-phase precipitation could easily form in the alloy with higher oxygen, thus I......
and supercooled liquid phase from 0K to 1357.77K. It is found that the heat capacity of Debye-Grüneisen model at low temperature is lower than experimental data and leads to the higher transitional entropy and Gibbs energy. Keeping the continuum of cp, H and S between the supercooled and real liquid phase of Cu at melting point, the thermodynamic properties of liquid Cu can be obtained and they agree......
field, temperature filed and solute filed when supercooled melt flow velocity is 0 at t=34200Δt, respectively. When the melt flow velocity is 1.3 m/s, phase field, temperature filed and solute-flow... Trans. Nonferrous Met. Soc. China 22(2012) 391-397 Effect of forced lamina flow on microsegregation simulated by phase field method quantitatively WANG Jun-wei1, WANG Zhi-ping1, 2, LU Yang1, 2, ZHU......
of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)Abstract:The crystallization process of Zr55Al10Ni5Cu30 bulk amorphous alloy in the supercooled liquid... temperature, and supercooled liquid region associated with the thermal stability of this alloy were measured. It is found that, in the case of continuous heating, both the onset and peak crystallization......
