Solute Diffusion Controlled Dendritic Growth Under High Undercooling Conditions
CAO Chong-de, LU Xiao-yu, WEI Bing-bo
Department of Applied Physics, Northwestern Polytechnical University, Xian 710072
Solute Diffusion Controlled Dendritic Growth Under High Undercooling Conditions
CAO Chong-de;LU Xiao-yu;WEI Bing-bo
Department of Applied Physics, Northwestern Polytechnical University, Xian 710072
关键词 ：
81.10.Aj ,
81.10.Fq ,
81.30.Fb
Abstract ： Liquid Cu70 Co30 alloy is undercooled up to 363 K (0.22TL ) by using glass-fluxing technique. The LKT/BCT dendritic growth theory is modified and made applicable to predict the kinetic characteristics of dendritic growth in those alloy systems which have extremely curved liquidus and solidus lines. Actual calculations reveal that the dendritic growth of primary α-Co phase in Cu70 Co30 alloy is constantly controlled by solute diffusion. The growth velocity of α-Co dendrite has a maximum value of 54.5mm/s at an undercooling of 333K. The calculated solubility of Cu in α-Co dendrite decreases with the increase of undercooling, which agrees well with the experimental data. Prior to peritectic transformation, the growth of α-Co dendrite is close to equilibrium solidification.
Key words ：
81.10.Aj
81.10.Fq
81.30.Fb
出版日期: 1998-11-01
:
81.10.Aj
(Theory and models of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation)
81.10.Fq
(Growth from melts; zone melting and refining)
81.30.Fb
(Solidification)
引用本文:
CAO Chong-de;LU Xiao-yu;WEI Bing-bo. Solute Diffusion Controlled Dendritic Growth Under High Undercooling Conditions[J]. 中国物理快报, 1998, 15(11): 840-842.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y1998/V15/I11/840
[1]
CHEN Wan-Chun;CHEN Xiao-Long. Chiral Symmetry Breaking During Growing Process of NaClO3 Crystal under Direct-Current Electric Field
[2]
PAN Xiu-Hong;JIN Wei-Qing;HONG Yong;AI Fei. In Situ Observation of Skeletal Shape Transition during BaB2 O4 Crystal Growth in High-Temperature Solution
[3]
GUO Xing-Yuan;XU Da-Peng;DING Zhan-Hui;SU Wen-Hui;. Preparation and Raman Spectrum of Rutile Single Crystals Using Floating Zone Method
[4]
HONG Yong;AI Fei;PAN Xiu-Hong;JIN Wei-Qing;ZHONG Wei-Zhuo;SHINICHI Yoda. Growth of NaBi(WO4 )2 Dendrite and Mechanism
[5]
ZANG Chuan-Yi;JIA Xiao-Peng;MA Hong-An;LI Shang-Sheng;TIAN Yu;XIAO Hong-Yu. Grow Large High-Quality Diamonds with Different Seed Surfaces
[6]
ZANG Chuan-Yi;JIA Xiao-Peng;MA Hong-An;TIAN Yu;XIAO Hong-Yu. Effect of Regrown Graphite on the Growth of Large Gem Diamonds by Temperature Gradient Method
[7]
YU Ke;ZHANG Yong-Sheng;OUYANG Shi-Xi;ZHANG Qing-Jie;LUO Lai-Qiang;ZHANG Qiu-Xiang;CHANG Zhong-Kun;LI Li-Jun;ZHU Zi-Qiang. Synthesis and Field Emission of ZnO Nanostructures on CuO Catalyzed Porous Silicon Substrate
[8]
WANG Xian-Cheng;MA Hong-An;ZANG Chuan-Yi;TIAN Yu;LI Shang-Sheng;JIA Xiao-Peng;. Growth of Large High-Quality Type-II a Diamond Crystals
[9]
CHEN Qing-Jun; SHEN Jun; FAN Hong-Bo;SUN Jian-Fei;HUANG Yong-Jiang;MCCARTNEY D. G.. Glass-Forming Ability of an Iron-Based Alloy Enhanced by Co Addition and Evaluated by a New Criterion
[10]
G. A. Gamal;M. Abou Zied;A. A. Ebnalwaled. Electronic Properties of Red P-Type Tl2 S5 Single Crystals
[11]
CAO Chong-De;Georg P. GöRLER. Direct Measurement of the Metastable Liquid Miscibility Gap in Fe--Co--Cu Ternary Alloy System
[12]
PAN Xiu-Hong;HONG Yong;JIN Wei-Qing. In Situ Observation of Cell-to-Dendrite Transition
[13]
CHEN Wan-Chun;LIU Dao-Dan;WANG YU-Ren. Morphological Evolution during Synthesis of New AlPO4 .H2 O Crystal
[14]
ZANG Chuan-Yi;JIA Xiao-Peng;REN Guo-Zhong;WANG Xian-Cheng. Dependence of Growing High-Quality Gem Diamonds on Growth Rates by Temperature Gradient Method
[15]
WANG Nan; WEI Bing-Bo. Droplet Undercooling During Containerless Processing in a Drop Tube
1998, Vol. 15 
