Elucidation of Mechanism on Metallic Glass Coating Formation by Observation of Single Particle's Behavior
Elucidation of Mechanism on Metallic Glass Coating Formation by Observation of Single Particle's Behavior
复制标题
通过观察单个粒子的行为来阐明金属玻璃涂层的形成机制
DOI：
10.2207/qjjws.26.74
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
T. Igarashi
中科院分区：
文献类型：
--
作者：
M. Fukumoto;Y. Okuwa;M. Yamada;T. Yasui;Yoshitsugu Motoe;K. Nakashima;T. Igarashi
大块非晶合金具有优异的力学、化学和磁学性能。由于无序原子排列在液态下是稳定的，即使在很低的淬火速率下，如0.1- 100 K/s，BMG合金也可以容易地从液态中获得玻璃相。也就是说，它们不需要以超过106 K/s的速度从液态冷却下来，例如有序非晶合金。因此，厚的金属玻璃涂层已成功地制造基板上的常规热喷涂方法。为了阐明铁基非晶合金中非晶相的形成机理，本研究通过比较Fe 43 Cr 16 Mo 16 C15 B 10非晶粉末与其经预处理的晶化粉末的飞行温度历程，估算了非晶相颗粒的飞行温度历程。此外，还比较了具有高温低速特征的大气等离子喷涂（APS）和具有低温高速特征的超音速火焰喷涂（HVOF）的颗粒行为，结果表明，在超音速火焰喷涂中，采用超临界流体沉积法，可以获得较厚的含玻璃相的BMG涂层。在喷涂过程中不加热到液相的冷却的液态。
Bulk metallic glass (BMG) alloys exhibit excellent nature in mechanical, chemical and magnetic properties. Because random atomic arrangement is stable in liquid state, glass phase of BMG alloys can be obtained easily from liquid even at much lower quenching rate, like 0.1–100K/s. That is, they don't need to be cooled down at more than 106K/s from liquid state, such as an ordinal amorphous alloy. Thus, thick metallic glass coatings have been successfully fabricated on the substrate by regular thermal spraying methods. However, glass forming mechanism in thermal spray process hasn't been understood clearly up to today.In this study, in order to elucidate the formation mechanism of glass phase in iron-base metallic glass, in-flight temperature history of the particles was estimated by comparing the results between Fe43Cr16Mo16C15B10 metallic glass powder and its crystallized powder by pre-heat treatment. Moreover, comparison of the particles behavior between atmospheric plasma spraying (APS), which is characterized as high temperature low velocity process, and high velocity oxy fuel spraying (HVOF), which characterized as low temperature high velocity process, was conducted.Consequently, it was revealed that the thick coating with glass phase of BMG can be easily obtained in HVOF process by depositing the particles at super-cooled liquid state without heating to the liquid phase during spraying.
影响因子：
6
作者：
Yamasaki, M;Kagao, S;Kawamura, Y
通讯作者：
Kawamura, Y