Moving the pulsed heating technique beyond monolithic specimens: Experiments with coated wires
Moving the pulsed heating technique beyond monolithic specimens: Experiments with coated wires
复制标题
将脉冲加热技术扩展到整体样本之外：使用涂层线进行实验
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
M. Rappaz
中科院分区：
文献类型：
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作者：
D. Josell;D. Basak;J. McClure;U. Kattner;Maureen E. Williams;W. Boettinger;M. Rappaz
脉冲加热实验，测量高温热物理性能，使用高温测量的温度-时间的历史，金属样品通过电流快速加热，在美国国家标准与技术研究所有30年的历史。近年来，已经做出努力，以超越使用昂贵的黑体几何样品的标准技术的限制。具体而言，同时偏振测量光谱发射率允许研究片材和线材试样。本文介绍了两个努力的结果，以扩大超出宏观整体，单相材料的所有以前的研究。在第一项研究中，测量了沉积在较高熔点Mo基底上的涂层（包括Ti和Ti（Al）合金）的熔化温度。在第二项研究中，测量了由较高熔点的W和Mo涂层覆盖的基体Ti和Cr的熔化温度。
Pulsed heating experiments that measure high-temperature thermophysical properties using pyrometric measurement of the temperature–time history of metal specimens rapidly heated by passage of electric current have a 30-year history at the National Institute of Standards and Technology. In recent years, efforts have been made to move beyond the limitations of the standard technique of using costly, black-body geometry specimens. Specifically, simultaneous polarimetry measurement of the spectral emissivity has permitted study of sheet and wire specimens. This paper presents the results of two efforts to expand beyond the macroscopically monolithic, single-phase materials of all previous studies. In the first study the melting temperatures of coatings, including Ti and Ti(Al) alloys, deposited on higher melting Mo substrates are measured. In the second study the melting temperatures of substrates, Ti and Cr, covered by higher melting W and Mo coatings are measured.