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首页800-1100K氧化铜生长下红铜T2正常光谱发射率建模与实验研究
800-1100K氧化铜生长下红铜T2正常光谱发射率建模与实验研究
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更新于2024-08-26
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本文是一篇技术论文,编号为TP2884,标题为《800-1,100 K温度下红铜T2在氧化物生长过程中的正常光谱发射率建模》。作者Deheng Shi、Fenghui Zou、Zunlue Zhu和Jinfeng Sun的研究专注于模拟在氧化物生长过程中,红铜T2材料在800至1100开尔文(K)范围内的正常光谱发射率行为。实验的核心是在一个持续6小时的加热周期内,对16个不同的恒定温度进行研究。 研究中,使用了InGaAs光电二极管作为探测器,其在1.5微米波长下测量样品的正常辐射,确保测量尽可能精确。为了确定样品表面的实际温度,研究人员采用两个对称且紧密焊接在样品前端表面附近的铂铑热电偶,通过对它们的温度读数取平均值来获取数据。值得注意的是,正常光谱发射率在每个恒温阶段的初始加热期间表现出强烈的振荡,这与样品表面氧化层的增长密切相关。 论文深入探讨了这种振荡现象,其可能源于样品表面氧化层发出的辐射与基片辐射之间的干涉效应。研究者通过分析模型,详细研究了正常光谱发射率的变化以及加热时间的影响,模型中采用了简单的函数形式,包括指数函数和对数函数,以高效地复制这些变化。论文还提供了关于由表面氧化作用引起的正常光谱发射率不确定度的估计,约为3.3%至10.0%,同时讨论了温度不确定性,大约在3.2K至10.0K之间。 该研究对于理解高温下红铜T2的光学性质及其在氧化环境中的行为具有重要意义,对于材料科学家和工程师来说,提供了有关如何控制和预测此类材料在工业应用中的性能的重要参考。
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TECHNICAL PAPER TP 2884
Modeling the Normal Spectral Emissivity of Red Copper T2
at 800–1,100 K During the Growth of Oxide Layer
Deheng Shi
•
Fenghui Zou
•
Zunlue Zhu
•
Jinfeng Sun
Received: 3 September 2014 / Accepted: 12 November 2014 / Published online: 30 December 2014
Ó The Indian Institute of Metals - IIM 2014
Abstract This paper strives to model the normal spectral
emissivity of red copper T2 during the growth of oxide
layer at 800–1,100 K. For this reason, the normal spectral
emissivity of red copper T2 specimens is evaluated at the
sixteen definite temperatures during a 6-h heating period.
In experiment, the normal radiance is measured using an
InGaAs photodiode detector at 1.5 lm, which is perpen-
dicular to the surface of specimens as accurately as pos-
sible. The temperature of specimen surface is obtained by
averaging the two platinum–rhodium thermocouples,
which are welded symmetrically and tightly in the front
surface of specimens near the measuring area viewed by
the detector. The strong oscillation of normal spectral
emissivity occurs only during the initial heating period at
each definite temperature, which has been affirmed to be
connected with the thickness of oxide layer on the speci-
men surface. The interference effect between the radiation
coming from the oxide layer on the specimen surface and
the radiation stemming from the substrate is discussed,
which is responsible to the strong oscillations of normal
spectral emissivity. The uncertainty of normal spectral
emissivity contributed only by the surface oxidization is
estimated to be 3.3–10.0 %, and the corresponding uncer-
tainty of temperature is estimated to be about 3.2–10.0 K.
The analytical models between the normal spectral emis-
sivity and the heating time are evaluated in detail. A simple
functional form with the exponential and logarithmic
functions has been found to reproduce well the variation of
normal spectral emissivity with the heating time, including
the fundamental reproduction of strong oscillation occur-
ring during the initial heating period.
Keywords Normal spectral emissivity Oxide layer
Oscillation of spectral emissivity Heating time
Red copper T2
1 Introduction
Copper T2 materials have wide applications in every type
of modern industry due to its excellent thermal conduc-
tivity, plasticity and corrosion resistance, full recyclability,
fire resistance, great tensile strength, and ease of fabrica-
tion. A number of manufacture processes in copper, such as
extruding and rolling, usually encounter very high tem-
perature above 1,000 K, and are highly temperature-
dependent. To attain desired mechanical properties, ensure
product quality, and reduce cost, the accurate control of
temperature is very important almost in all the processes in
production. For this reason, we must accurately measure
and control the surface temperature in the manufacture
processes. However, some production processes, such as
extruding and rolling, preclude direct physical contact of a
temperature probe with the surface of fast-moving copper
materials. As a consequence, only the non-contact passive
radiation thermometry can be efficiently used as a powerful
tool to monitor the surface temperature of copper materials.
A single-wavelength thermometry requires the accurate
spectral emissivity as its input data. A multi-wavelength
thermometry needs prior accurate knowledge between the
spectral emissivity and the wavelength and temperature.
However, the spectral emissivity greatly varies with vari-
ous factors, such as the emission angle [1, 2], surface
roughness [3], alloy composition [4], and temperature and
D. Shi (&) F. Zou Z. Zhu J. Sun
College of Physics and Electronic Engineering, Henan Normal
University, Xinxiang 453007, China
e-mail: scattering@sina.com.cn
123
Trans Indian Inst Met (2015) 68(4):601–609
DOI 10.1007/s12666-014-0490-8
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