Improving fire retardancy of Ti alloys with a refractory ceramic barrier layer

Reliable service of indispensable titanium alloys in aeroengines is limited by the bottleneck problem of titanium fires. In this study, a tri-layer fire retardant coating with a bi-functional ceramic barrier layer is proposed to suppress titanium fire. Results show that the current coating can incre...

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Main Authors: Lin Chen, Yu Dong, Yun-Qi Tong, Mei-Jun Liu, Guan-Jun Yang
Format: Article
Language:English
Published: Elsevier 2023-12-01
Series:Corrosion Communications
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S2667266923000427
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author Lin Chen
Yu Dong
Yun-Qi Tong
Mei-Jun Liu
Guan-Jun Yang
author_facet Lin Chen
Yu Dong
Yun-Qi Tong
Mei-Jun Liu
Guan-Jun Yang
author_sort Lin Chen
collection DOAJ
description Reliable service of indispensable titanium alloys in aeroengines is limited by the bottleneck problem of titanium fires. In this study, a tri-layer fire retardant coating with a bi-functional ceramic barrier layer is proposed to suppress titanium fire. Results show that the current coating can increase the fire retardant temperature by ≥ 300 K under droplet ignition. Thermal barrier effect of the YSZ refractory ceramic layer significantly reduces Ti alloy temperature, and oxygen barrier effect prevents active Ti from directly contacting oxygen during the entire ablation process. Therefore, the two barrier effects effectively prevent occurrence of titanium fire. In addition, dissolution of the Ni-based abradable seal coating makes burning TC4 molten droplet extinguished in a short time, thus further inhibiting titanium fire ignition. The present study provides an effective method for reliable service and titanium fire-resistant design of titanium alloys.
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spelling doaj.art-177f4beca68243cab1b8d7e983cde6b92023-12-20T07:39:35ZengElsevierCorrosion Communications2667-26692023-12-01121928Improving fire retardancy of Ti alloys with a refractory ceramic barrier layerLin Chen0Yu Dong1Yun-Qi Tong2Mei-Jun Liu3Guan-Jun Yang4State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, ChinaState Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, ChinaState Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, ChinaState Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, ChinaCorresponding author.; State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, ChinaReliable service of indispensable titanium alloys in aeroengines is limited by the bottleneck problem of titanium fires. In this study, a tri-layer fire retardant coating with a bi-functional ceramic barrier layer is proposed to suppress titanium fire. Results show that the current coating can increase the fire retardant temperature by ≥ 300 K under droplet ignition. Thermal barrier effect of the YSZ refractory ceramic layer significantly reduces Ti alloy temperature, and oxygen barrier effect prevents active Ti from directly contacting oxygen during the entire ablation process. Therefore, the two barrier effects effectively prevent occurrence of titanium fire. In addition, dissolution of the Ni-based abradable seal coating makes burning TC4 molten droplet extinguished in a short time, thus further inhibiting titanium fire ignition. The present study provides an effective method for reliable service and titanium fire-resistant design of titanium alloys.http://www.sciencedirect.com/science/article/pii/S2667266923000427Ceramic barrier coatingAbradable seal coatingFire retardantAblationMelting
spellingShingle Lin Chen
Yu Dong
Yun-Qi Tong
Mei-Jun Liu
Guan-Jun Yang
Improving fire retardancy of Ti alloys with a refractory ceramic barrier layer
Corrosion Communications
Ceramic barrier coating
Abradable seal coating
Fire retardant
Ablation
Melting
title Improving fire retardancy of Ti alloys with a refractory ceramic barrier layer
title_full Improving fire retardancy of Ti alloys with a refractory ceramic barrier layer
title_fullStr Improving fire retardancy of Ti alloys with a refractory ceramic barrier layer
title_full_unstemmed Improving fire retardancy of Ti alloys with a refractory ceramic barrier layer
title_short Improving fire retardancy of Ti alloys with a refractory ceramic barrier layer
title_sort improving fire retardancy of ti alloys with a refractory ceramic barrier layer
topic Ceramic barrier coating
Abradable seal coating
Fire retardant
Ablation
Melting
url http://www.sciencedirect.com/science/article/pii/S2667266923000427
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AT meijunliu improvingfireretardancyoftialloyswitharefractoryceramicbarrierlayer
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