Acta Metall Sin  1996, Vol. 32 Issue (11): 1177-1183    DOI:

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NUCLEATING MECHANISM OF FIVE PETAL STAR-SHAPED PRIMARY SILICON

GUI Manchang (Beijing Institute of Aeronautical Materials; Beijing 100095); JIA Jun; LI Qingchun (Harbin Institute of Technology; Harbin 150001)

GUI Manchang (Beijing Institute of Aeronautical Materials; Beijing 100095); JIA Jun; LI Qingchun (Harbin Institute of Technology; Harbin 150001). NUCLEATING MECHANISM OF FIVE PETAL STAR-SHAPED PRIMARY SILICON. Acta Metall Sin, 1996, 32(11): 1177-1183.

Abstract References Related Articles Recommended Metrics Download:  PDF(597KB)  Export:  BibTeX | EndNote (RIS)       Abstract  Five petal star-shaped primary silicon in hypereutectic Al-Si alloy possesses a nucleating characteristic by agglomerating from tiny polyhedron clasters with simple shape.From the veiwpoint of thermodynamics, it is a spontaneous process that the five fine tetrahedron or octahedron clasters agglomerate in a way of fivefold twinning. The agglomerated polyhedron may grow into a five petal star-shaped primary silicon. By combining clasters with smaller size than that of critical nucleation, the polyhedron can acts as a stable nucleus of primary silicon. Correspondent: GUI Manchang, senior engineer, Post Box 81-3, Beijing Institute of Aeronautical Materials,Beijing 100095 Key words:  Al-Si alloy      primary silicon      nucleation      agglomeration      Received:  18 November 1996      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1996/V32/I11/1177 1KobayashiKF,HoganLM．JMaterSci,1985;20:19612HellawellA．ProgMaterSci,1970;15:33KobayashiKF,HoganLM．PhilosMag,1979;40A:3994GuiManchang,JiaJun,SongGuangsheng,LiPeiyong,LiQinqchun,ActaMetallSin(EnglishEd),1994;7:495桂满昌,宋广生,贾钧,李庆春．金属学报,1995;31:A1776SinghM,KumarR．JMaterSci,1973;8:3177KumarR,SivaramakrishanCS,MahantiK．Aluminium,1977;6:3618InoS．JPhysSocJpn,1969;27:941^ [1] ZHAO Yafeng, LIU Sujie, CHEN Yun, MA Hui, MA Guangcai, GUO Yi. Critical Inclusion Size and Void Growth in Dual-Phase Ferrite-Bainite Steel During Ductile Fracture[J]. 金属学报, 2023, 59(5): 611-622. [2] WU Caihong, FENG Di, ZANG Qianhao, FAN Shichun, ZHANG Hao, LEE Yunsoo. Microstructure Evolution and Recrystallization Behavior During Hot Deformation of Spray Formed AlSiCuMg Alloy[J]. 金属学报, 2022, 58(7): 932-942. [3] LI Xifeng, LI Tianle, AN Dayong, WU Huiping, CHEN Jieshi, CHEN Jun. Research Progress of Titanium Alloys and Their Diffusion Bonding Fatigue Characteristics[J]. 金属学报, 2022, 58(4): 473-485. [4] ZHENG Qiuju, YE Zhongfei, JIANG Hongxiang, LU Ming, ZHANG Lili, ZHAO Jiuzhou. Effect of Micro-Alloying Element La on Solidification Microstructure and Mechanical Properties of Hypoeutectic Al-Si Alloys[J]. 金属学报, 2021, 57(1): 103-110. [5] Juan DU, Xiaoxing CHENG, Tiannan YANG, Longqing CHEN, Frédéric Mompiou, Wenzheng ZHANG. In Situ TEM Study on the Sympathetic Nucleation of Austenite Precipitates[J]. 金属学报, 2019, 55(4): 511-520. [6] Guangdong WANG, Ni TIAN, Changshu HE, Gang ZHAO, Liang ZUO. Formation of Second-Phases in a Direct-Chill Casting Al-12Si-0.65Mg-xMn Alloy[J]. 金属学报, 2018, 54(7): 1059-1067. [7] Shubo LI, Wenbo DU, Xudong WANG, Ke LIU, Zhaohui WANG. Effect of Zr Addition on the Grain Refinement Mechanism of Mg-Gd-Er Alloys[J]. 金属学报, 2018, 54(6): 911-917. [8] Dandan FAN, Junfeng XU, Yanan ZHONG, Zengyun JIAN. Effect of Superheated Temperature and Cooling Rate on the Solidification of Undercooled Ti Melt[J]. 金属学报, 2018, 54(6): 844-850. [9] Tongmin WANG, Jingjing WEI, Xudong WANG, Man YAO. Progress and Application of Microstructure Simulation of Alloy Solidification[J]. 金属学报, 2018, 54(2): 193-203. [10] Jincheng WANG, Can GUO, Qi ZHANG, Sai TANG, Junjie LI, Zhijun WANG. Recent Progresses in Modeling of Nucleation During Solidification on the Atomic Scale[J]. 金属学报, 2018, 54(2): 204-216. [11] Zongyuan ZOU, Xiaokui XU, Yinxiao LI, Chao WANG. Study on the Method of Improving the Toughness of CGHAZ for High Heat Input Welding Steels[J]. 金属学报, 2017, 53(8): 957-967. [12] Ning LI,Rong ZHANG,Limin ZHANG,Hui XING,Pengfei YIN,Yaoyan WU. Study on Grain Refinement Mechanism of Hypoeutectic Al-7%Si Alloy Under Low Voltage Alternating Current Pulse[J]. 金属学报, 2017, 53(2): 192-200. [13] Jin WANG, Yuefei ZHANG, Jinyao MA, Jixue LI, Ze ZHANG. Microcrack Nucleation and Propagation Investigation ofInconel 740H Alloy Under In SituHigh Temperature Tensile Test[J]. 金属学报, 2017, 53(12): 1627-1635. [14] Yong YANG,Zhaodong WANG,Tianrui LI,Tao JIA,Xiaolin LI,Guodong WANG. A Model for Precipitation-Temperature-Time Curve Calculation[J]. 金属学报, 2017, 53(1): 123-128. [15] Rui CHEN, Qingyan XU, Qinfang WU, Huiting GUO, Baicheng LIU. NUCLEATION MODEL AND DENDRITE GROWTH SIMULATION IN SOLIDIFICATON PROCESS OF Al-7Si-Mg ALLOY[J]. 金属学报, 2015, 51(6): 733-744. No Suggested Reading articles found! Viewed Full text Abstract Cited   Shared      Discussed