Effect of TiO_2 and ZrO_2 reinforcements on properties of Al_2O_3 coatings fabricated by thermal flame spraying

作     者：Rassim YOUNES Mohand Amokrane BRADAI Abdelhamid SADEDDINE Youcef MOUADJI Ali BILEK Abderrahim BENABBAS Rassim YOUNES;Mohand Amokrane BRADAI;Abdelhamid SADEDDINE;Youcef MOUADJI;Ali BILEK;Abderrahim BENABBAS

作者机构：Laboratory of Mechanics Materials and Energetic Faculty of Technology University of Bejaia Laboratory of Mechanics Faculty of Engineering Sciences Campus Chaabet-ErsasUniversity of Constantine Mechanical Laboratory of Structure and Energetic Mechanical Engineering DepartmentUniversity of Tizi-Ouzou Laboratory Processes for Materials Energy Water and Environment Faculty of Science and TechnologyUniversity of Bouira 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2016年第26卷第5期

页      面：1345-1352页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：thermal spraying coatings reinforcements friction coefficient wear rate 

摘      要：The alumina composite coatings reinforced with 25% ZrO2 （denoted as AZ-25） and 3% TiO2 （denoted as AT-3） were deposited on low carbon steel using a thermal flame spraying. The microstructure, phase composition, microhardness and tribological properties of the coatings were investigated. The XRD results of the coatings reinforced by TiO2 （AT-3） revealed the presence of α-Al2O3 phase as matrix and new metastable phases of α-Al2O3 and α-Al2O3. However, the coatings reinforced by ZrO2 （AZ-25） consist of α-Al2O3 as matrix, q-ZrO2 and m-ZrO2. In most studied conditions, the AT-3 coating displays a better tribological performance, i.e., lower coefficient of frictions and wear rates, than the AZ-25 coating. It was also found that the microhardness of the coatings was decreased with the reinforcement of ZrO2 and increased with TiO2.