High Temperature Oxidation Behaviors of BaO/TiO<sub>2</sub> Binary Oxide-Enhanced NiAl-Based Composites

High temperature lubricating composites have been widely used in aerospace and other high-tech industries. In the actual application process, high temperature oxidation resistance is a very importance parameter. In this paper, BaO/TiO<sub>2</sub>-enhanced NiAl-based composites were prepa...

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Autores principales:	Bo Li, Ruipeng Gao, Hongjian Guo, Congmin Fan
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	hot-press sintering oxidation resistance performance oxidation mechanism element diffusion Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/6676ca9ccc934f33a670b4945faa07a1
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spelling	oai:doaj.org-article:6676ca9ccc934f33a670b4945faa07a12021-11-11T18:04:46ZHigh Temperature Oxidation Behaviors of BaO/TiO<sub>2</sub> Binary Oxide-Enhanced NiAl-Based Composites10.3390/ma142165101996-1944https://doaj.org/article/6676ca9ccc934f33a670b4945faa07a12021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6510https://doaj.org/toc/1996-1944High temperature lubricating composites have been widely used in aerospace and other high-tech industries. In the actual application process, high temperature oxidation resistance is a very importance parameter. In this paper, BaO/TiO<sub>2</sub>-enhanced NiAl-based composites were prepared by vacuum hot-press sintering. The oxidation resistance performance of the composites at 800 °C was investigated. The composites exhibited very good sintered compactness and only a few pores were present. Meanwhile, the composite had excellent oxidation resistance properties due to the formation of a dense Al<sub>2</sub>O<sub>3</sub> layer which could prevent further oxidation of the internal substrate; its oxidation mechanism was mainly decided by the outward diffusion of Al and the inward diffusion of O. The addition of BaO/TiO<sub>2</sub> introduced more boundaries and made the K<sub>p</sub> value increase from 1.2 × 10<sup>−14</sup> g<sup>2</sup>/cm<sup>4</sup> s to 3.3 × 10<sup>−14</sup> g<sup>2</sup>/cm<sup>4</sup> s, leading to a slight reduction in the oxidation resistance performance of the composites—although it was still excellent.Bo LiRuipeng GaoHongjian GuoCongmin FanMDPI AGarticlehot-press sinteringoxidation resistance performanceoxidation mechanismelement diffusionTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6510, p 6510 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	hot-press sintering oxidation resistance performance oxidation mechanism element diffusion Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	hot-press sintering oxidation resistance performance oxidation mechanism element diffusion Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Bo Li Ruipeng Gao Hongjian Guo Congmin Fan High Temperature Oxidation Behaviors of BaO/TiO<sub>2</sub> Binary Oxide-Enhanced NiAl-Based Composites
description	High temperature lubricating composites have been widely used in aerospace and other high-tech industries. In the actual application process, high temperature oxidation resistance is a very importance parameter. In this paper, BaO/TiO<sub>2</sub>-enhanced NiAl-based composites were prepared by vacuum hot-press sintering. The oxidation resistance performance of the composites at 800 °C was investigated. The composites exhibited very good sintered compactness and only a few pores were present. Meanwhile, the composite had excellent oxidation resistance properties due to the formation of a dense Al<sub>2</sub>O<sub>3</sub> layer which could prevent further oxidation of the internal substrate; its oxidation mechanism was mainly decided by the outward diffusion of Al and the inward diffusion of O. The addition of BaO/TiO<sub>2</sub> introduced more boundaries and made the K<sub>p</sub> value increase from 1.2 × 10<sup>−14</sup> g<sup>2</sup>/cm<sup>4</sup> s to 3.3 × 10<sup>−14</sup> g<sup>2</sup>/cm<sup>4</sup> s, leading to a slight reduction in the oxidation resistance performance of the composites—although it was still excellent.
format	article
author	Bo Li Ruipeng Gao Hongjian Guo Congmin Fan
author_facet	Bo Li Ruipeng Gao Hongjian Guo Congmin Fan
author_sort	Bo Li
title	High Temperature Oxidation Behaviors of BaO/TiO<sub>2</sub> Binary Oxide-Enhanced NiAl-Based Composites
title_short	High Temperature Oxidation Behaviors of BaO/TiO<sub>2</sub> Binary Oxide-Enhanced NiAl-Based Composites
title_full	High Temperature Oxidation Behaviors of BaO/TiO<sub>2</sub> Binary Oxide-Enhanced NiAl-Based Composites
title_fullStr	High Temperature Oxidation Behaviors of BaO/TiO<sub>2</sub> Binary Oxide-Enhanced NiAl-Based Composites
title_full_unstemmed	High Temperature Oxidation Behaviors of BaO/TiO<sub>2</sub> Binary Oxide-Enhanced NiAl-Based Composites
title_sort	high temperature oxidation behaviors of bao/tio<sub>2</sub> binary oxide-enhanced nial-based composites
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/6676ca9ccc934f33a670b4945faa07a1
work_keys_str_mv	AT boli hightemperatureoxidationbehaviorsofbaotiosub2subbinaryoxideenhancednialbasedcomposites AT ruipenggao hightemperatureoxidationbehaviorsofbaotiosub2subbinaryoxideenhancednialbasedcomposites AT hongjianguo hightemperatureoxidationbehaviorsofbaotiosub2subbinaryoxideenhancednialbasedcomposites AT congminfan hightemperatureoxidationbehaviorsofbaotiosub2subbinaryoxideenhancednialbasedcomposites
_version_	1718431946534551552

High Temperature Oxidation Behaviors of BaO/TiO<sub>2</sub> Binary Oxide-Enhanced NiAl-Based Composites

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