Development of Near-Surface Composition Anomaly

被引:0
|
作者
Yong W. Kim
机构
[1] Lehigh University,Department of Physics
来源
关键词
ablation; composition profile; cooling; heating; laser-produced plasma; thermal diffusivity; Wood's alloy;
D O I
暂无
中图分类号
学科分类号
摘要
Many multi-element alloy specimens have been shown to possess a wide variety of near-surface elemental composition profiles, which are significantly different from the bulk composition. Such composition nonuniformity adversely affects the measurement of basic thermophysical properties in alloys. In this paper is presented a new investigation into the mechanisms by which such depth-dependent near-surface elemental composition develops. Specifically, specimens of a low melting-point metallic alloy, Wood's alloy, as a model system are examined under varying thermal cycling conditions within a chamber of controlled gaseous atmosphere. The near-surface composition and thermal diffusivity are measured as a function of depth. The method of time-resolved spectroscopy of laser-produced plasma plumes emanating from the specimen surface is used. Different surface composition profiles emerge depending on the dynamic range of the thermal cycling forced on a specimen.
引用
收藏
页码:575 / 586
页数:11
相关论文
共 50 条
  • [31] Advances in near-surface seismology
    Baker, Gregory S.
    Gilcrist, Laura E.
    Gaines, David P.
    [J]. NEAR-SURFACE GEOPHYSICS AND HUMAN ACTIVITY, 2008, : 62 - 66
  • [32] MICROTREMORS, A NEAR-SURFACE PHENOMENON?
    Nieto, D.
    Baradello, L.
    Kaka, S. I.
    Vesnaver, A.
    [J]. JOURNAL OF SEISMIC EXPLORATION, 2011, 20 (04): : 379 - 398
  • [33] The near-surface evening transition
    Mahrt, L.
    [J]. QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, 2017, 143 (708) : 2940 - 2948
  • [34] LUNAR NEAR-SURFACE STRUCTURE
    COOPER, MR
    KOVACH, RL
    WATKINS, JS
    [J]. REVIEWS OF GEOPHYSICS, 1974, 12 (03) : 291 - 308
  • [35] Near-surface ocean temperature
    Ward, B
    [J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 2006, 111 (C2)
  • [36] NEAR-SURFACE AND DEEP GROUNDWATERS
    SEILER, KP
    LINDNER, W
    [J]. JOURNAL OF HYDROLOGY, 1995, 165 (1-4) : 33 - 44
  • [37] NEAR-SURFACE CURRENT MEASUREMENTS
    SAUNDERS, PM
    [J]. DEEP-SEA RESEARCH, 1976, 23 (03): : 249 - 257
  • [38] Near-surface crystallization of PET
    Shinotsuka, Kei
    Bliznyuk, Valery N.
    Assender, Hazel E.
    [J]. POLYMER, 2012, 53 (24) : 5554 - 5559
  • [39] DAYTIME NEAR-SURFACE CURRENT
    KUDRIAVTSEV, VN
    SOLOVIEV, AV
    [J]. DOKLADY AKADEMII NAUK SSSR, 1988, 303 (01): : 59 - 62
  • [40] NEAR-SURFACE KIRKENDALL EFFECT
    GEGUZIN, YE
    PARITSKAYA, LN
    [J]. FIZIKA METALLOV I METALLOVEDENIE, 1975, 40 (01): : 85 - 91