连续生产金属玻璃涂层复合线材的涂层厚度控制

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"Coating thickness control in continuously fabricating metallic glass-coated composite wires (2013年)" 是一篇发表在《International Journal of Minerals, Metallurgy and Materials》2013年第20卷第5期，页码456，DOI为10.1007/s12613-013-0751-2的科研论文。该论文由Bao-yu Zhang, Xiao-hua Chen, Zhao-ping Lu和Xi-dong Hui等人撰写，来自中国科学技术大学北京分校的先进金属与材料国家重点实验室。文章主要探讨了连续生产过程中，在金属线表面涂覆块体金属玻璃涂层的技术。研究了加工参数，包括拉拔速度和涂层温度对涂层厚度的影响。实验结果显示，随着拉拔速度的增加，涂层厚度也相应增加；相反，当涂层温度升高时，涂层厚度会减小。这表明加工参数对涂层性能有显著影响。为了量化不同工艺条件下的涂层厚度，作者建立了一个流体力学模型。该模型能够预测在各种加工条件下的涂层厚度，并且计算结果与实验数据吻合良好，证明了理论模型的有效性。这一研究对于理解和优化金属玻璃涂层复合线材的连续制造过程具有重要意义，可以为工业生产提供指导，提高产品质量和生产效率。关键词：工程技术、论文、金属玻璃涂层、复合线材、拉拔速度、涂层温度、流体力学模型、涂层厚度控制。

Int ernational Journal of Minerals, Metallurgy a nd Materials

Volume20 ,Number5 ,May2013,Page456

DOI: 10.1007/s12613-013-0751-2

Coating thickness control in continuously fabricating metallic

glass-coated composite wires

Bao-yu Zhang, Xiao-hua Chen, Zhao-ping Lu, and Xi-dong Hui

State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China

(Received: 7 May 2012; revised: 16 September 2012; accepted: 6 November 2012)

Abstract: A continuous production process was developed for coating bulk metallic glasses on the metallic wire surface.

The eﬀects of processing parameters, including the drawing velocity and coating temperature, on the coating thickness

were investigated. It is found that the coating thickness increases with the increase in drawing velocity but decreases with

the increase in coating temperature. A ﬂuid mechanical model was developed to quantify the coating thickness under

various processing conditions. By using this theoretical model, the coating thickness was calculated, and the calculated

values are in good agreement with the experimental data.

Keywords: composite materials; metallic glass; coatings; thickness control

1. Introduction

Since metallic glasses (MGs) were ﬁrst synthesized

through rapid quenching of the melt by Klement et al. [1],

they have been attracting great attention because of

their excellent mechanical, physical, and chemical prop-

erties [2-5]. Compared with their crystalline counterparts,

bulk metallic glasses (BMGs) usually have higher fracture

strength, lower Young’s modulus, higher elastic limit, and

better corrosion resistance. However, monolithic BMGs

usually form highly localized shear bands, resulting in

catastrophic fracture along the main shear band [6-8]. The

room temperature brittleness has become an obstacle for

the application of BMGs as engineering structural mate-

rials. Then again, the shear fracture feature is beneﬁcial

for the improvement of the penetrating ability of armor-

piercing bullets. Rong et al. [9] performed ballistic tests

using tungsten ﬁber-reinforced Zr-based BMG composites

and found that the penetrator made of BMG matrix com-

posites exhibited a higher penetrating eﬃciency than the

one made of tungsten heavy alloys. BMGs are also promis-

ing to be potential coating materials due to their excellent

corrosion resistance [10-11]. Therefore, it is of signiﬁcance

to develop a valid process for the fabrication of BMG-based

composites.

Tungsten ﬁber-reinforced BMG matrix composites are

usually synthesized by melt inﬁltration casting, which is

not suitable for the continuous manufacture of large-sized

BMG composites [12-13]. This kind of process also de-

pends on the glass-forming ability of BMGs, which limits

the critical size of composites. To overcome this draw-

back, we have developed a continuous production process

of BMG-coated composite wires [14-15], as shown in Fig. 1.

The continuous production system consists of a vacuum

chamber and a crucible surrounded with a heater. The

wire bundles, which were fed continuously from a bob-

bin, passed through the preheating unit ﬁrst and then im-

mersed into molten metal for inﬁltration. After the inﬁl-

tration, the wire bundles passed through the argon cooling

unit that oﬀered suﬃcient cooling capacity. Finally, the

BMG coating was successfully produced. It was found that

12.5

22.5

(Vit 1, at%) BMG-coated tung-

sten composite wires produced by this process possessed

comparable ultimate strength and ductility with the bare

tungsten wire under tensile loading [15]. Process parame-

ters such as the wire drawing speed, inﬁltration time, and

melt temperature can be controlled through setting a se-

ries of controlling programs. The coating thickness plays

an important role in the mechanical properties and cor-

rosion resistance of BMG-coated composite wires. In this

work, the eﬀects of processing parameters, that is, wire

Corresponding author: Xiao-hua Chen, Xi-dong Hui E-mail: chenxh@skl.ustb.edu.cn, xdhui@ustb.edu.cn

〇 University of Science and Technology Beijing and Springer-Verlag Berlin Heidelberg 2013

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