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Ials and Chemistry Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China Correspondence: [email protected] (B.L.); [email protected] (C.F.)Citation: Li, B.; Gao, R.; Guo, H.; Fan, C. High Temperature Oxidation Behaviors of BaO/TiO2 Binary Oxide-Enhanced Indoximod Autophagy NiAl-Based Composites. Materials 2021, 14, 6510. 10.3390/ma14216510 Academic Editors: Nigel Simms, Gianfranco Dell’Agli, Andrzej Dziedzic and Tomasz Dudziak Received: 30 August 2021 Accepted: 25 October 2021 Published: 29 OctoberAbstract: High temperature lubricating composites have already been widely utilized in aerospace along with other high-tech industries. In the actual application process, high temperature oxidation resistance is a extremely importance parameter. Within this paper, BaO/TiO2 -enhanced NiAl-based composites were ready by vacuum hot-press sintering. The oxidation resistance efficiency from the composites at 800 C was investigated. The composites exhibited very excellent sintered compactness and only a couple of pores were present. Meanwhile, the composite had outstanding oxidation resistance properties because of the formation of a dense Al2 O3 layer which could stop further oxidation of your internal substrate; its oxidation mechanism was mostly decided by the outward diffusion of Al as well as the inward diffusion of O. The addition of BaO/TiO2 introduced far more boundaries and created the Kp value raise from 1.2 10-14 g2 /cm4 s to three.3 10-14 g2 /cm4 s, top to a slight reduction in the oxidation resistance performance of the composites–although it was nonetheless outstanding. Search phrases: hot-press sintering; oxidation resistance overall performance; oxidation mechanism; element diffusion1. Introduction So as to meet the speedy improvement of aerospace, power, chemical as well as other industries, high temperature structural components with great extensive overall performance have been extensively studied in current years [1]. Quite a few moving components of those industrial fields, such as engineering, bearings, cutting tools, turbine blades, sealing devices, and so forth., are utilized in really harsh operating environment [5]. Supplies will expertise severe high temperature friction and wear complications in these circumstances. Therefore, it really is really urgent to look for outstanding high-temperature lubricating components to meet the development requires of those industries. Composites consisting of a higher temperature matrix and high temperature lubricant phase is often properly developed to make promising high-temperature lubricating components. Lubrication at greater temperature can only be accomplished by solid lubricants. Conventional strong lubricants like soft metals (Au, Ag, etc.), fluorides (BaF2 , CaF2 , and so on.), graphite, MoS2 and certain metal oxides (V2 O5 , ZnO, and so on.) have been developed at medium temperatures [86]. X. Shi et al. fabricated the M50 oS2 self-lubricating composite, which possessed great tribological properties from 150 to 450 C. Even so, a few of their intrinsic deficiencies make it hard to realize productive lubrication at high temperatures. As an example, Ag will migrate quickly at elevated temperatures [17]; graphite and MoS2 cannot present desirable lubrication at high temperatures simply because of poor oxidation resistance [8]. Recently, double metal oxides, which present very good chemical and structuralPublisher’s Note: MDPI stays neutral with regard to jurisdictional claims in PD-168077 In stock Published maps and institutional affiliations.Copyright: 2021 by the authors. Licensee MDPI, Basel, Switzerland. This articl.