DENUCLEATION AND HIGH UNDERCOOLING OF Ni-32.5%Sn EUTECTIC ALLOY

Abstract

Abstract: Undercoolings up to 397 K(0.283 T_E)have been obtained for Ni-32.5% Sn eutectic alloy melted by superheating-cooling cycles and denucleating with inorganic glasses.The predomi- nant dissipation of heat for highly undercooled alloy melt is through radiation.An approxi- mate method is consequently derived to calculate its mean specific heat from measured cooling curves.With the aid of high speed cinematography,it is revealed that the surface or interface heterogeneous nucleation takes place in preference to homogeneous nucleation even though the undercooling has exceeded 0.2 T_E.

Key words: undercooling, rapid solidification, nucleation, eutectic alloy, specific

WEI Bingbo YANG Gencang ZHOU Yaohe Northwestern Polytechnical University,Xi'an,China. DENUCLEATION AND HIGH UNDERCOOLING OF Ni-32.5%Sn EUTECTIC ALLOY[J]. Acta Metallurgica Sinica (English Letters), 1991, 4(8): 115-120.

[1]	Tao Liu, Yuejiao Chen, Libao Chen. 3D Printing Engineered Multi-porous Cu Microelectrodes with In Situ Electro-Oxidation Growth of CuO Nanosheets for Long Cycle, High Capacity and Large Rate Supercapacitors [J]. Acta Metallurgica Sinica (English Letters), 2021, 34(1): 85-97.
[2]	Lujun Zhou, Shanwu Yang, Yi Dong, Wenhua Zhang, Jianwen Ding, Guoliang Liu, Chengjia Shang, Raja Devesh Kumar Misra. Characterization of Compactness of Rust Layers on Weathering Steels by an Adsorption/Dehydration Test of Ethanol [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(6): 846-856.
[3]	Mohamad Ebrahimnia, Yujiang Xie, Changtai Chi. Effect of laser power and deposition environment on the microstructure and properties of direct laser metal-deposited 12CrNi2 steel [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(4): 528-538.
[4]	Hamid Ashrafi, Morteza Shamanian, Rahmatollah Emadi, Ehsan Ghassemali. Void Formation and Plastic Deformation Mechanism of a Cold-Rolled Dual-Phase Steel During Tension [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(2): 299-306.
[5]	Xin He, Jianbo Zhang, Yuanyi Peng, Jingan Li, Jian Ding, Chang Liu, Xingchuan Xia, Xueguang Chen, Yongchang Liu. Microstructure Evolution of Primary γ′ Phase in Ni₃Al-Based Superalloy [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(12): 1709-1726.
[6]	Dong-Xu Qiao, Hui Jiang, Wen-Na Jiao, Yi-Ping Lu, Zhi-Qiang Cao, Ting-Ju Li. A Novel Series of Refractory High-Entropy Alloys Ti₂ZrHf_0.5VNb_x with High Specific Yield Strength and Good Ductility [J]. Acta Metallurgica Sinica (English Letters), 2019, 32(8): 925-931.
[7]	Sandip Sabale, Vidhya Jadhav, Shubhangi Mane-Gavade, Xiao-Ying Yu. Superparamagnetic CoFe₂O₄@Au with High Specific Absorption Rate and Intrinsic Loss Power for Magnetic Fluid Hyperthermia Applications [J]. Acta Metallurgica Sinica (English Letters), 2019, 32(6): 719-725.
[8]	Z. D. Fan, D. Wang, C. Liu, G. Zhang, J. Shen, L. H. Lou, J. Zhang. Low-Cycle Fatigue Properties of Nickel-Based Superalloys Processed by High-Gradient Directional Solidification [J]. Acta Metallurgica Sinica (English Letters), 2017, 30(9): 878-886.
[9]	Ren-Guo Guan, Di Tie. A Review on Grain Refinement of Aluminum Alloys: Progresses, Challenges and Prospects [J]. Acta Metallurgica Sinica (English Letters), 2017, 30(5): 409-432.
[10]	Tan He,Rui Hu,Tie-Bang Zhang,Jin-Shan Li. Effect of Nb Content on Solidification Characteristics and Microsegregation in Cast Ti-48Al-xNb Alloys [J]. Acta Metallurgica Sinica (English Letters), 2016, 29(8): 714-721.
[11]	Di Cao, Yuan Wu, Hui Wang, Xiong-Jun Liu, Z. P. Lu. Effects of Nitrogen on the Glass Formation and Mechanical Properties of a Ti-Based Metallic Glass [J]. Acta Metallurgica Sinica (English Letters), 2016, 29(2): 173-180.
[12]	Hui-Jun Kang, Zhong-Lue Hu, Xiao-Xia Gao, Zong-Ning Chen, Yi-Ping Lu, Jin-Chuan Jie, Jing-Jie Guo. 3D Morphology and Formation Process of the Icosahedral Quasicrystalline Phase in Rapidly Solidified Al-Mn Alloy [J]. Acta Metallurgica Sinica (English Letters), 2016, 29(1): 28-31.
[13]	Tan He, Rui Hu, Jun Wang, Jie-Ren Yang, Jin-Shan Li. Effects of β-Dendrite Growth Velocity on β → α Transformation of Hypoperitectic Ti-46Al-7Nb Alloy [J]. Acta Metallurgica Sinica (English Letters), 2015, 28(1): 58-63.
[14]	Dan-Hui Hou, Song-Mao Liang, Rong-Shi Chen, Chuang Dong, En-Hou Han. Effects of Sb Content on Solidification Pathways and Grain Size of AZ91 Magnesium Alloy [J]. Acta Metallurgica Sinica (English Letters), 2015, 28(1): 115-121.
[15]	Wenjing YAO, Xiuling NIU, Long ZHOU, Nan WANG, Jehyun LEE. Competition Growth of α and β Phases in Ti-50 at.%Al Peritectic Alloy during the Rapid Solidification by Laser Melting Technique [J]. Acta Metallurgica Sinica (English Letters), 2013, 26(5): 523-532.

DENUCLEATION AND HIGH UNDERCOOLING OF Ni-32.5%Sn EUTECTIC ALLOY

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments