| 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 Author | Liang, Jing(liangj@atm.neu.edu.cn) |
| 2021-09-15 | |
| Source Publication | SURFACE & COATINGS TECHNOLOGY
 |
| ISSN | 0257-8972 |
| Volume | 421Pages:12 |
| Abstract | The 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. |
| Keyword | LaB6 Laser cladding Composite coatings Oxidation behavior Microstructure |
| Funding Organization | National Key Research and Development Program of China ; NSFC-Liaoning ; NSFC ; Key R&D Projects in Liaoning Province |
| DOI | 10.1016/j.surfcoat.2021.127445 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key Research and Development Program of China[2016YFB1100203] ; NSFC-Liaoning[U1508213] ; NSFC[51201030] ; Key R&D Projects in Liaoning Province[2020JH2/10100022] |
| WOS Research Area | Materials Science ; Physics |
| WOS Subject | Materials Science, Coatings & Films ; Physics, Applied |
| WOS ID | WOS:000681716300022 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/159316 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Liang, Jing |
| Affiliation | 1.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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