Article
Chemistry, Physical
Guang-Yuan Cui, Rui-Ying Luo, Lian-Yi Wang, Peng Huang, Jia-Qi Song, Jin-Sen Wang
Summary: In this study, the mechanical properties of SiCf/SiC composites with a BN/SiC multilayer interface after oxidation at different temperatures were evaluated. The results showed significant temperature-dependent strength degradation and different degradation mechanisms for the oxidized composites. The deterioration of mechanical properties at higher temperatures was attributed to weak interface bonding causing fiber breakage hysteresis.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Manufacturing
Yin Wang, Yong Ma, Ruixiao Zheng, Lu Li, Yuli Chen, Bin Ding
Summary: This paper investigates the effect of pyrolytic carbon (PyC) interphase on the interface shear behavior of SiCf/SiC composites through molecular dynamics simulations. The results show that the deformation behavior of the interface changes from localized penetrating sliding to large-scale uniform plasticity as the orientation angle (OA) increases. The mechanism of weakening shear resistance through the introduction of amorphous carbon (a-C) component is revealed. Moreover, the strain rate effect on the interfacial shear strength is discussed.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Materials Science, Ceramics
Jingfei Yin, Min Li, Jiuhua Xu, Wenfeng Ding, Honghua Su
Summary: Silicon carbide fiber-reinforced silicon carbide ceramic matrix composite (SiCf/SiC) shows great potential for manufacturing aero-engines due to its high-temperature resistance and lightweight properties. However, the machining process of SiCf/SiC is challenging due to the material's hardness and brittleness, which often results in uncontrolled damages such as edge chipping, cracks, and fiber breakage. This research focuses on studying the edge chipping characteristics of SiCf/SiC during single grain grinding. The study finds that the edge chipping in SiC matrix grinding is influenced by pre-existing defects, while the edge chipping in SiC fiber grinding is dependent on both fiber orientation and grinding speed. Grinding perpendicular to the fiber orientation results in larger edge chipping compared to grinding along with the fiber orientation, and higher grinding speeds also decrease the width of the edge chipping area. Therefore, increasing grinding speed can enhance material removal rate without enlarging edge chipping, which is crucial for achieving desired surface finish and damage control in the machining of SiCf/SiC.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Yujie Ma, Shaobo Yang, Xinyu Meng, Sijie Kou, Juanli Deng, Shangwu Fan
Summary: The microstructure and mechanical properties of CVI-Cansas-III/PyC/SiC composites were investigated after heat treatment under high temperature argon atmosphere. The degradation of Cansas-III fibers and a decline in bending strength were observed with increasing heat treatment temperature. The composites exhibited pseudo-plastic fracture behavior below 1450°C, but showed brittle fracture of the ceramic after 100 hours of heat treatment at 1500°C due to the complete crystallization of the fibers.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Jiaheng Zeng, Quanli Zhang, Jing Zhao, Yibin Cai, Chenglong Chu, Yandan Zhu, Jiuhua Xu
Summary: This study focuses on the use of nanosecond pulsed laser to process SiCf/SiC composite. The influence of scanning speed and laser scanning direction on the morphology of ablated grooves is investigated. Results show that increased laser scanning speed and anisotropy of the material affect the ablation effect and groove morphology.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Kyung Ho Kim, Yoon Soo Han, Sahn Nahm, Sung-Min Lee
Summary: A new impedance spectroscopy technique was developed to study the oxidation kinetics of the pyrolytic carbon interphase layer in SiCf/SiC ceramic matrix composites. The AC impedance Nyquist plot exhibited two semicircles that were fitted using an equivalent circuit. The analysis revealed a decrease in capacitance in the low-frequency region with increasing oxidation time, which was associated with the thickness of the oxidized SiO2 layer. This study provides a significant contribution to the literature, which has mainly focused on mechanical characterization of ceramic matrix composites, and highlights the limitations and potential applications of the developed method.
JOURNAL OF ASIAN CERAMIC SOCIETIES
(2023)
Article
Materials Science, Ceramics
Xiaxiang Zhang, Jinren Yi, Xin Yang, Yuanqi Weng, Cunqian Fang, Qizhong Huang
Summary: Two types of novel modified C/C-SiC-ZrC composites were prepared with PyC/SiC and PyC/BN dual-layer interphases formed on fibers through chemical vapor infiltration. The PyC/SiC interface showed better enhancement in mechanical properties and lower ablation rates compared to the PyC/BN interface modified composites.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Xirui Lv, Mengkun Yue, Wenfan Yang, Xue Feng, Xiaoyan Li, Yumin Wang, Jiemin Wang, Jie Zhang, Jingyang Wang
Summary: Model composites with tunable SiCf/Yb2Si2O7 interfaces were processed by Spark Plasma Sintering, achieving weak and strong interfaces at different sintering temperatures. Different debonding mechanisms were observed in indentation crack test, with weak interfaces showing crack deflection and low debond energy compared to strong interfaces. The strong interface demonstrated high debond energy and crack penetration, promising improved performance under higher combustion temperature. Adjusting interfacial strength or debond energy could optimize the mechanical fuse mechanism in SiCf/SiC CMC.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Xiao Han, Guoqiang Yu, Sheng Zhang, Jian Shi, Xiguang Gao, Yingdong Song, Fang Wang
Summary: The effect of PyC interface thickness on the heat-stability of Cansas-II SiCf/SiC composites under 1,500°C was investigated. The bonding strength of the thin interface (about 200 nm) decreased from 74.4 to 20.1 MPa (73.0%) after 50 hours of heat treatment, while that of the thick interface (about 2 μm) declined from 7.3 to 3.2 MPa (52.7%). The composites with the thin interface exhibited higher tensile strength after heat treatment due to better interface bonding strength.
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
(2023)
Article
Materials Science, Ceramics
Guodong Sun, Chen Zhang, Qing Zhang, Yi Zhang, Laifei Cheng, Xingang Luan, Chengpeng Yang
Summary: This study comprehensively evaluated the mechanical properties of continuous SiC fiber reinforced SiC ceramic matrix composites and verified the correlation laws between different properties. The results showed that fiber bridging is the key mechanism controlling this correlation, while interlaminar shear is influenced by matrix cracking and interlaminar pores.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Suya Ji, Bin Liang, Bin Yang, Chenglong Hu, Yan Jiang, Shengyang Pang, Jian Li, Rida Zhao, Sufang Tang
Summary: Self-healing SiCf/SiC-SiBCN composites with different boron contents were studied for their long-term oxidation behavior and strength retention properties. After 100 hours of oxidation at 1200-1350 degrees Celsius, the composites showed parabolic mass gain. The oxidation rate constants increased with increasing oxidation temperature, and the oxidation activation energy decreased due to the low initial oxidation temperature of boron-rich SiBCN. The composites exhibited higher strength retention rates after 1350 degrees Celsius oxidation, with the boron-rich composites showing a strength retention rate of up to 104% due to their good self-healing capacity and high CVI-SiC content.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Yunfa Jia, Guoqiang Yu, Jian Shi, Song Dong, Xiguang Gao, Yingdong Song, Fang Wang
Summary: The tensile-tension fatigue behavior of minicomposite SiC/(PyC/SiC)2/SiC at room temperature was studied, and the residual mechanical properties of specimens were tested after 106 pre-fatigue cycles under different stress levels. It was found that the residual strength initially increases due to stress concentration release and then decreases because of excessive fiber wear. Additionally, the tensile curve of pre-fatigue specimens showed two deflections, with the first correlated with matrix crack reopening and the second occurring when the uniaxial tensile load exceeds the pre-fatigue stress.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Xiao Han, Xihui Chen, Xuming Niu, Zhigang Sun, Yingdong Song
Summary: The study found that the CVI PyC interface has better heat-resistance at high temperatures compared to the CVI BN interface, as a result of the improved crystallization degree and decomposition of the matrix in the CVI BN interface.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Lijuan Jiang, Yinzhi Zhou, Jianhua Hou, Baolin Wu, Zhenhua Hou, Fengnian Jin
Summary: The study found that 3D braided SiC/SiC composites with a combined (PyC + SiC) multilayer interface showed superior static and dynamic properties after oxidation.
CERAMICS INTERNATIONAL
(2021)
Article
Metallurgy & Metallurgical Engineering
Suya Ji, Bin Liang, Chenglong Hu, Shengyang Pang, Rida Zhao, Jian Li, Sufang Tang
Summary: The oxidation behaviors of self-healing SiCf/SiC-SiBCN composites were studied in H2O/O-2 and H2O/O-2/Na2SO4 environments. The involvement of Na2SO4 led to the formation of a loose lamellar oxide layer and accelerated the oxidation of the composites. The composites showed different retention rates of strength depending on the environment, with the maximum retention rate in H2O/O-2 at 1200 ? and the minimum in H2O/O-2/Na2SO4 at 1350 ?.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Yue Yu, Ruiying Luo, Haidong Shang, Tianying Wang, Jiani Wang, Lianyi Wang
Review
Chemistry, Physical
Lihui Cui, Ruiying Luo, Lianyi Wang, Hao Luo, Chuyan Deng
JOURNAL OF ALLOYS AND COMPOUNDS
(2018)
Article
Electrochemistry
Jingming Gong, Lianyi Wang, Xingju Miao, Lizhi Zhang
ELECTROCHEMISTRY COMMUNICATIONS
(2010)
Article
Materials Science, Ceramics
Tao Han, Ruiying Luo, Guangyuan Cui, Lianyi Wang
CERAMICS INTERNATIONAL
(2019)
Article
Materials Science, Ceramics
Tao Han, Ruiying Luo, Guangyuan Cui, Lianyi Wang
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2019)
Article
Materials Science, Ceramics
Lian-Yi Wang, Rui-Ying Luo, Guang-Yuan Cui
CERAMICS INTERNATIONAL
(2020)
Article
Materials Science, Ceramics
Lian-Yi Wang, Rui-Ying Luo, Guang-yuan Cui, Zhao-feng Chen
CERAMICS INTERNATIONAL
(2020)
Article
Engineering, Chemical
Hao Luo, Rui-Ying Luo, Lian-Yi Wang, Peng Huang
Summary: A novel graphene-modified high-temperature resistant adhesive was developed for bonding carbon/carbon composites, showing improved mechanical properties and thermal conductivities. The optimal performance was achieved with 1.5 wt% graphene content, which led to enhanced bonding strength and thermal conductivity compared to other content percentages. The adhesive properties also significantly influenced the braking performance due to thermal conductivity effects on friction surface temperature and distribution.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2021)
Article
Materials Science, Ceramics
Hao Luo, Rui-Ying Luo, Lian-Yi Wang, Peng Huang, Guang-Yuan Cui, Jia-Qi Song
Summary: SiC/SiC composites prepared through precursor infiltration and pyrolysis (PIP) and chemical vapor infiltration (CVI) exhibit different microstructures and mechanical properties. PIP composites showed cracks and amorphous crystal structure, while CVI composites had tightly bonded matrix without cracks and high crystallinity. After heat treatment, PIP composites experienced significant decrease in bending strength and modulus, while CVI composites maintained good mechanical properties.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Guang-Yuan Cui, Rui-Ying Luo, Lian-Yi Wang, Peng Huang
Summary: In this study, SiC nanowires (SiCNWS) were grown on the surface of PyC interface via chemical vapor infiltration (CVI) to enhance the mechanical characteristics and thermal conductivity of three-dimensional SiCf/SiC composites. The presence of SiCNWS resulted in a 46% increase in flexural strength and significant enhancement of thermal conductivity in the temperature range of 25-1000 degrees C. Analysis of energy release during damage evolution process revealed delayed damage evolution due to decreased porosity, crack deflection, and bridging of SiCNWS. The excellent thermal conductivity was attributed to thermally conductive pathways formed by SiCNWS in the dense structure.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Wang Lian-yi, Luo Rui-ying, Shagn Hai-dong, Cui Guang-yuan
NEW CARBON MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Zhichao Shang, Xiaoping Cai, Farshid Pahlevani, Yan Zheng, Akbar Hojjati-Najafabadi, Xinran Gao, Baojing Zhang, Peizhong Feng
Summary: High porosity Co-Al-Fe intermetallics with 3D-microstructures were successfully synthesized in one step via a thermal explosion reaction. The link between pore structure and permeability was investigated using 3D-XRM technology. The corrosion resistance of the samples with different Fe contents was studied at 900 degrees C under an oxygen/sulphur atmosphere for up to 120 h. The results showed that the samples maintained stable pore structure and intact internal matrices, attributed to the formation of a thin protective layer on the surface. In addition, inward diffusion of S resulted in the formation of FeS nodules.
Article
Materials Science, Multidisciplinary
Lian Ma, Hain Yang, Daquan Zhang, Wei Wu
Summary: In this study, an environmentally friendly volatile corrosion inhibitor, lysine salts (LA), was prepared between graphene oxide (GO) layers using an in situ intercalation technique. The corrosion inhibition effect of LA was evaluated, and it was found that LA-GO2 achieved a 99.3% corrosion inhibition efficiency after composition optimization. The inhibition of the electrochemical anodic process on the surface of mild steel was the main reason for the high corrosion inhibition efficiency of LA-GO2. The properties of the surface film on the corroded steel were also characterized in detail to understand the corrosion inhibition mechanism of LA-GO2.
Article
Materials Science, Multidisciplinary
Running Wang, Jiaping Zhang, Bing Liu, Jie Fei, Qiangang Fu
Summary: By introducing a tailored SiC-C interphase, the carbon fiber can be effectively protected, improving the mechanical and ablation properties of leading edge shaped C/C-ZrC-SiC composites.
Article
Materials Science, Multidisciplinary
Zihua Wang, Chijia Wang, Ruitao Wang, Jiapeng Deng, Kun Zhang, Yanji Zhu, Huaiyuan Wang
Summary: A robust anti-corrosive coating has been developed using functional fly ash, which demonstrates excellent corrosion resistance and improved mechanical properties. The coating achieves these enhancements through molecular cross-linking design and surface augmentation techniques, resulting in a significantly improved impedance modulus compared to pure polyurea coatings.
Article
Materials Science, Multidisciplinary
Haofei Sun, Meifeng Li, Hao Zhang, Jing Liu
Summary: The oxidation behavior of FeCrNi medium entropy alloy was investigated through experimental observations and density functional theory (DFT) calculations. The study found that at 900 degrees C, the alloy forms a desirable and continuous oxide layer, while at 1000 degrees C, the oxide layer becomes discontinuous with penetration of oxide. These observations highlight the significant role of phase structure in promoting the formation of protective oxide scales and influencing oxidation resistance.
Article
Materials Science, Multidisciplinary
Yang Li, Ke Ma, Jingjun Xu, Jingjing Li, Yueming Li, Yi Zhang, Jun Zuo, Meishuan Li
Summary: Cr2AlC diffusion barrier effectively blocks the diffusion of Ti, enhancing the stability and spalling resistance of the Al2O3 scales between NiCrAlY coating and TiAl alloy.
Article
Materials Science, Multidisciplinary
Weiyi Wang, Qinglin Pan, Xiangdong Wang, Bing Liu
Summary: By adding Ce, Sc, Y and Zr elements to Al-Mg-Si alloy, the microstructure of the alloy can be regulated, and the corrosion and heat resistance of the materials can be improved.
Article
Materials Science, Multidisciplinary
Andrea Cristoforetti, Javier Izquierdo, Ricardo M. Souto, Flavio Deflorian, Michele Fedel, Stefano Rossi
Summary: This study presents a new approach to studying the mechanism of filiform corrosion in organic coated steel using the scanning vibrating electrode technique (SVET) and micropotentiometry (potentiometric SECM). The electrochemical activity under the coating was evaluated by mapping the ionic current densities coming from artificial defects made in specific locations of the filament. Antimony tips were also used to investigate the pH changes associated with different corrosion reactions at the metal-paint interface. Local pH levels along the filament in the anodic and cathodic regions were determined.
Article
Materials Science, Multidisciplinary
Yang Gao, Dayun Sun, Zhu Liu, Shuo Cong, Rui Tang, Yanping Huang, Lefu Zhang, Xianglong Guo
Summary: The corrosion characteristics of a novel alumina-forming austenitic steel in high-pressure high-temperature water environment were studied. The addition of aluminum has a negative effect on the continuity of the alumina scale.
Article
Materials Science, Multidisciplinary
Negin Madelat, Benny Wouters, Peter Visser, Zahra Jiryaeisharahi, Kristof Marcoen, Shoshan T. Abrahami, Annick Hubin, Herman Terryn, Tom Hauffman
Summary: This work explores the correlation between electrolyte transport properties and the variation of pigment volume concentration (PVC) in organic coatings. An odd random phase electrochemical impedance spectroscopy (ORP-EIS) approach is used to analyze the diffusion of ions independent from water uptake. The results show that a higher PVC leads to a more homogeneous coating structure, resulting in faster diffusion of ions and enhanced water uptake.
Article
Materials Science, Multidisciplinary
Eloa Lopes Maia, Serguei Gavrilov, Valentyn Tsisar, Kitty Baert, Iris De Graeve
Summary: The effect of pre-oxidation in air at 300-500°C on the initiation and development of liquid metal corrosion attack on 316L austenitic steel in static lead-bismuth eutectic (LBE) has been investigated. It was found that pre-formed oxide films can protect the surface against dissolution, while high temperature pre-oxidation leads to localized corrosion.
Article
Materials Science, Multidisciplinary
Baozhuang Sun, Qiuyu Wang, Yue Pan, Zhiyong Liu, Cuiwei Du, Xiaogang Li
Summary: In this study, a non-steady electrochemical model was established to investigate stress corrosion cracking (SCC). The model was verified using 304 SS with various microstructures, confirming its effectiveness in assessing SCC susceptibility.
Article
Materials Science, Multidisciplinary
Xingyu Xiao, Xinhua Liu, Zhilei Wang, Xuexu Xu, Mingying Chen, Jianxin Xie
Summary: The corrosion behavior and mechanisms of Cu-10Ni-X (Al, Fe, Mn, Cr, Sn, Ti, Zn) alloys in a 3.5% NaCl solution were systematically investigated. Both computational and experimental results revealed that except Ti, other elements could enhance the corrosion resistance of Cu2O passivation film.
Article
Materials Science, Multidisciplinary
Gen Zhang, Yan-Ping Huang, E. Jiang, Wei -Wei Liu, Hong Yang, Jing Xiong, Yong-Fu Zhao
Summary: The addition of aluminum has a significant influence on the intermetallic compounds in AFA alloys, particularly increasing the content of B2-NiAl phase. In the SCO2 environment, the oxide scales formed on AFA alloys with aluminum were thinner than on ASS without aluminum, and the structure of the oxide scales changed to a double-layer structure.
Article
Materials Science, Multidisciplinary
Yuxuan He, Guozheng Xiao, Chao Wang, Xuefeng Lu, Liuyuan Li, Shiying Liu, Yusheng Wu, Zhanjie Wang
Summary: The relationship between configurational entropy and lattice distortion in novel rare earth monosilicates was investigated, and the effect of configurational entropy on their properties was studied. The results showed that lattice distortion increased with the increase of configurational entropy, but a highly symmetrical crystal structure was formed when the configurational entropy was large enough, inhibiting the lattice distortion.
