Effects of Tribological Performance of Surface Texture coated with Ti-based Thin Film Metallic Glass on Different Substrates

• Main Authors: TING-WEI CHANG, 張婷惟
• Other Authors: Yuan-Ching Lin
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/4tu252

碩士 === 國立臺灣科技大學 === 機械工程系 === 105 === In this study, surface coating with different thickness (200 and 400nm) of Ti-based (Ti43Zr15Cu37Nb3Co2) thin film metallic glass (TFMG) were successfully deposited on the 7075 aluminum alloy and AISI 1045 medium carbon steel to the improve the tribological properties of the substrate. Wear tests were conducted in the environment with refrigerant oil to evaluate the tribological performance of the coating. In addition, the chemical composition of the specimens were identified by X-Ray photoelectron spectroscope. The wear, nanoindentation and scratch test were used to characterize wear resistance, mechanical properties and adhesion strength of thin film, respectively. ANSYS package was used to analyze the stress distribution of the Ti-based TFMG on the 7075 aluminum alloy and AISI 1045 medium carbon steel substrates, separately. The crucial factors of influence on tribological performance can thus be identified. According to the wear test results, surface of the specimen with cross texture coated with 200nm-thickness Ti-based TFMG presented the best wear resistance properties than the other specimens for the same substrate. It is attributed that the surface texture can increase adhesion strength due to the mechanical locking effect, thereby TFMG coating can increase tribological performance. Besides, a high ratio of the Young's modulus of the substrate and coating results low tensile stress, and thus thin film was not easy to crack presenting the better wear resistance.