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Effects of LaB6 on the high-temperature oxidation behavior of TiC+TiBx reinforced titanium matrix composite coatings fabricated by laser cladding
Yin, Xiuyuan1; Liang, Jing1; Gao, Yunfei1; Lin, Ziyang1; Chen, Suiyuan1; Liu, Changsheng1; Tian, Kun2; Zhang, Hongwei3; Tang, Guangquan3
Corresponding AuthorLiang, Jing(liangj@atm.neu.edu.cn)
2021-09-15
Source PublicationSURFACE & COATINGS TECHNOLOGY
ISSN0257-8972
Volume421Pages:12
AbstractThe effects of LaB6 addition on the oxidation behavior of TiC+TiBx reinforced titanium matrix composite coatings at the temperature of 600 degrees C were investigated. The results showed that severe oxidation occurred on the Ti-6Al-4V after oxidation at 600 degrees C for 50 h. The oxidation weight gain of the (TiC+TiBx)/Ti coating without LaB6 addition (2.43 mg/cm(2)) was reduced to 49.6% that of the Ti-6Al-4V substrate (4.9 mg/cm(2)). Though (TiC+TiBx)/Ti coatings improved the oxidation resistance for the surface of Ti-6Al-4V substrates, cracks were easily formed between the coarse rod-like TiB2 and the titanium matrix during the high temperature resulting in less high-temperature oxidation protection. When the LaB6 addition gradually increased from 0 wt% to 1.0 wt%, the oxidation weight gain decreased from 2.43 mg/cm(2) to 1.30 mg/cm(2), and the linear rate constant K-p1 decreased from 0.04752 to 0.02703. The oxidation law gradually changed from the linear law to the parabolic law when the LaB6 addition increased to 1.5 wt%, which indicated the oxide layer gradually became dense and protective. The oxidation weight gain decreased from 1.23 mg/cm(2) to 0.87 mg/cm(2) when the LaB6 addition increased from 1.5 wt% to 2.0 wt%, while increased instead when the LaB6 addition increased to 2.5 wt%. An appropriate amount of LaB6 (2.0 wt%) addition significantly improved the oxidation resistance of the coating with the lowest parabolic velocity constant K-p2 = 0.01418 due to the refinement of grain sizes of the coating, especially the refinement of the coarse rod-like TiB2 phase, which decreased the crack forming sensibility and increased the compactness and continuity of the oxidation layer. A small amount of in-situ formatted La2O3 at the grain boundaries acted as a barrier also blocked the ingress of oxygen.
KeywordLaB6 Laser cladding Composite coatings Oxidation behavior Microstructure
Funding OrganizationNational Key Research and Development Program of China ; NSFC-Liaoning ; NSFC ; Key R&D Projects in Liaoning Province
DOI10.1016/j.surfcoat.2021.127445
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2016YFB1100203] ; NSFC-Liaoning[U1508213] ; NSFC[51201030] ; Key R&D Projects in Liaoning Province[2020JH2/10100022]
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Coatings & Films ; Physics, Applied
WOS IDWOS:000681716300022
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/159316
Collection中国科学院金属研究所
Corresponding AuthorLiang, Jing
Affiliation1.Northeastern Univ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat, Key Lab Addit Mfg & Remfg Mat,Minist Educ, Shenyang 110819, Liaoning, Peoples R China
2.Shenyang Ruixian Intelligent Equipment Technol Co, Shenyang, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Yin, Xiuyuan,Liang, Jing,Gao, Yunfei,et al. Effects of LaB6 on the high-temperature oxidation behavior of TiC+TiBx reinforced titanium matrix composite coatings fabricated by laser cladding[J]. SURFACE & COATINGS TECHNOLOGY,2021,421:12.
APA Yin, Xiuyuan.,Liang, Jing.,Gao, Yunfei.,Lin, Ziyang.,Chen, Suiyuan.,...&Tang, Guangquan.(2021).Effects of LaB6 on the high-temperature oxidation behavior of TiC+TiBx reinforced titanium matrix composite coatings fabricated by laser cladding.SURFACE & COATINGS TECHNOLOGY,421,12.
MLA Yin, Xiuyuan,et al."Effects of LaB6 on the high-temperature oxidation behavior of TiC+TiBx reinforced titanium matrix composite coatings fabricated by laser cladding".SURFACE & COATINGS TECHNOLOGY 421(2021):12.
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