Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-19 Cooperative journals: 《金属学报》
Abstract： In order to increase the magnetic properties and realize the essential applications in magnetic recording and spintronics devices, it is significant to control the growth mode and grain size of Fe films. In this work, the effects of a high magnetic field (HMF) on the growth and magnetic properties of Fe thin films with different grain sizes by using physics vapor deposition were explored. The decreased grain sizes are obtained by increasing the evaporation source temperatures. It is found that when the evaporation source temperature is 1440 ℃, the grains of film are fine. The growth mode is changed from layered to columnar by HMF. And HMF effectively reduces the defects of Fe film. When the evaporation source temperature is 1400 and 1350 ℃, the grains of films are large. HMF does not change the columnar growth mode of films. However, the width of columns is improved by a HMF. Additionally, HMF increases the average particle (composed of the grains) and grain size of Fe films with different grain sizes.
Subjects: Materials Science >> Materials Science (General) submitted time 2016-11-15 Cooperative journals: 《金属学报》
Abstract：采用磁控溅射法制备了不同Al含量的Ti1-xAlxN涂层。经XRD、SEM、EDX和纳米压痕仪分析发现，Al含量在0.50-0.58之间时，Ti1-xAlxN涂层为（111）择优生长的面心立方结构。当Al含量增加到0.63时，涂层中有六方纤锌矿结构的AlN生成，涂层硬度降低。另外，随着Al含量的增加，涂层表面颗粒尺寸变大，涂层变疏松。钛合金切削实验表明，涂层刀具的磨损形式主要为粘结磨损和崩刃。在低速切削（65 m/min）时，Ti0.50Al0.50N涂层刀具的切削性能略好于无涂层刀具，并且都好于Ti0.42Al0.58N和Ti0.37Al0.63N涂层刀具。在高速切削（100 m/min）时，Ti0.50Al0.50N涂层刀具有最好的切削性能，比无涂层刀具提高4倍多。这主要因为Ti0.50Al0.50N涂层表面致密，硬度高，在钛合金切削时形成的切屑瘤致密而整齐。因此，在高速车削钛合金时推荐使用（111）择优取向、表面致密、低Al含量的Ti0.50Al0.50N涂层。
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