Preparation and characterization of SiO2 non-catalytic nucleation coating for the solidification of undercooled melt

被引:0
|
作者
Xi, ZZ [1 ]
Yao, X [1 ]
Zhang, LY [1 ]
机构
[1] Tongji Univ, Functional Mat Res Lab, Shanghai 200092, Peoples R China
关键词
high undercooling; catalytic nucleation; non-crystalline coating; sol-gel; bismuth; atomic force microscope;
D O I
暂无
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
SiO2 non-catalytic nucleation films were coated onto a ceramic substrate and the inner surface of a ceramic crucible by the Sol-Gel method. The surface morphology of the coatings was characterized with an atomic force microscope and a scanning electronic microscope. The non-catalytic effect of the coating on the heterogeneous nucleation of metal melts was tested through measuring the nucleation undercooling. Investigation results indicated that the prepared coating could act as a baffle-wall to prevent the metal melt from nucleating heterogeneously on the inner surface of the crystalline crucible. The tiny holes with a diameter below 2 mum and heaves on the coating surface have no evident effect on the undercooling of metal melts. For a poly-layer coating, the super-layer can cover the cracks in the sub-layers, which prevents the cracks in the coating from spreading in the direction vertical to the coating layers and thus eliminates the effect of cracks on the coating.
引用
收藏
页码:125 / 129
页数:5
相关论文
共 50 条
  • [2] Preparation of a Si-Zr-B non-catalytic nucleation coating mold for the rapid solidification of undercooled superalloy
    Liu, F
    Guo, XF
    Yang, GC
    JOURNAL OF MATERIALS SCIENCE LETTERS, 2000, 19 (22) : 2065 - 2067
  • [3] Non-catalytic nucleation coating for undercooled Cu50Ni50 melt
    郭学锋
    刘峰
    刘永长
    杨根仓
    邢建东
    ProgressinNaturalScience, 2000, (08) : 61 - 67
  • [4] Non-catalytic nucleation coating for undercooled Cu50Ni50 melt
    Guo, XF
    Liu, F
    Liu, YC
    Yang, GC
    Xing, JD
    PROGRESS IN NATURAL SCIENCE, 2000, 10 (08) : 619 - 625
  • [5] Synthesis and characterization of SiO2 nano- and microwires by a non-catalytic technique
    Casalegno, V.
    Rizzo, S.
    Canavese, G.
    Ventrella, A.
    Salvo, M.
    Ferraris, M.
    JOURNAL OF MATERIALS SCIENCE, 2013, 48 (18) : 6108 - 6114
  • [6] Synthesis and characterization of SiO2 nano- and microwires by a non-catalytic technique
    V. Casalegno
    S. Rizzo
    G. Canavese
    A. Ventrella
    M. Salvo
    M. Ferraris
    Journal of Materials Science, 2013, 48 : 6108 - 6114
  • [7] Preparation of Si-Zr-B non-catalytic nucleation compound coating mold
    Liu, F.
    Guo, X.F.
    Yang, G.C.
    Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research, 2000, 14 (06): : 599 - 603
  • [8] Structural stability and non-catalytic nucleation inhibition effect of Si-Zr-B mould coating on superalloy melt
    Liu, F
    Guo, XF
    Yang, GC
    MATERIALS SCIENCE AND TECHNOLOGY, 2001, 17 (09) : 1102 - 1106
  • [9] Preparation and Characterization of Amorphous SiO2 Coating SiCp/Cu Composites
    Ren, Xiangqian
    Fan, Bingbing
    Han, Qianfei
    Wang, Penghui
    Zhang, Rui
    HIGH-PERFORMANCE CERAMICS VII, PTS 1 AND 2, 2012, 512-515 : 945 - 950
  • [10] Characterization of nanopolyurethane/SiO2 coating
    Zhang Fan
    Han Xianghong
    Ge Jing
    Xin Zhongyin
    7TH ASIAN INTERNATIONAL CONFERENCE OF LEATHER SCIENCE AND TECHNOLOGY SECT 1 AND 2, 2006, : 614 - 622