{"title":"Synthesis and tribological characterization over a wide temperature range for A-site elements doping in Ti3AlC2","authors":"Leping cai, Jinxin Li, Baoji Luo, Nairu He, Mingjie Shen, Junhong Jia","doi":"10.1016/j.wear.2024.205466","DOIUrl":null,"url":null,"abstract":"<div><p>This work investigates the possibility of doping Si and Sn solid solution components (separate/simultaneous incorporation) into Ti<sub>3</sub>AlC<sub>2</sub> to provide desired mechanical properties and tribological self-adaptability over a broad temperature range. The specimens are sintered at 1450 °C for 2 h in a vacuum environment with a pressure of 30 MPa. The phase composition, mechanical properties and tribological characteristics sliding against Al<sub>2</sub>O<sub>3</sub> counter balls over a wide temperature range from room temperature to 800 °C are investigated. The results demonstrate considerable lattice distortion together with significant solid solution strengthening effects in quinary solid solutions. The friction coefficients of the four solid solutions are discovered to be temperature-sensitive from the distinguished variation tendencies in the wide temperature range. The wear rates exhibit a comparable tendency with test temperature that the values are two orders of magnitude lower at 600−800 °C than those at RT−400 °C. The noticeably lubricant tribofilm is responsible for the decreased wear rate at elevated temperatures. The distinct tribological behaviors of the quaternary and quinary solid solutions are ascribed to the characteristics of the self-generated oxides.</p></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":null,"pages":null},"PeriodicalIF":5.3000,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Wear","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S004316482400231X","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 0
Abstract
This work investigates the possibility of doping Si and Sn solid solution components (separate/simultaneous incorporation) into Ti3AlC2 to provide desired mechanical properties and tribological self-adaptability over a broad temperature range. The specimens are sintered at 1450 °C for 2 h in a vacuum environment with a pressure of 30 MPa. The phase composition, mechanical properties and tribological characteristics sliding against Al2O3 counter balls over a wide temperature range from room temperature to 800 °C are investigated. The results demonstrate considerable lattice distortion together with significant solid solution strengthening effects in quinary solid solutions. The friction coefficients of the four solid solutions are discovered to be temperature-sensitive from the distinguished variation tendencies in the wide temperature range. The wear rates exhibit a comparable tendency with test temperature that the values are two orders of magnitude lower at 600−800 °C than those at RT−400 °C. The noticeably lubricant tribofilm is responsible for the decreased wear rate at elevated temperatures. The distinct tribological behaviors of the quaternary and quinary solid solutions are ascribed to the characteristics of the self-generated oxides.
这项研究探讨了在 TiAlC 中掺入 Si 和 Sn 固溶体成分(单独/同时掺入)的可能性,以便在较宽的温度范围内提供所需的机械性能和摩擦学自适应性。试样在压力为 30 兆帕的真空环境中于 1450 °C 下烧结 2 小时。在从室温到 800 °C 的宽温度范围内,对相组成、机械性能和与 AlO 对球滑动的摩擦学特性进行了研究。结果表明,在二元固溶体中,晶格畸变相当大,固溶强化效应显著。从宽温度范围内的显著变化趋势来看,四种固溶体的摩擦系数都对温度敏感。磨损率随测试温度的变化呈现出相似的趋势,即 600-800 °C 时的值比 RT-400 °C 时的值低两个数量级。温度升高时磨损率降低的原因在于明显的润滑三膜。四元固溶体和二元固溶体的不同摩擦学行为归因于自生成氧化物的特性。
期刊介绍:
Wear journal is dedicated to the advancement of basic and applied knowledge concerning the nature of wear of materials. Broadly, topics of interest range from development of fundamental understanding of the mechanisms of wear to innovative solutions to practical engineering problems. Authors of experimental studies are expected to comment on the repeatability of the data, and whenever possible, conduct multiple measurements under similar testing conditions. Further, Wear embraces the highest standards of professional ethics, and the detection of matching content, either in written or graphical form, from other publications by the current authors or by others, may result in rejection.