Article
Chemistry, Physical
T. I. Milenov, I. A. Avramova, A. Dikovska, D. Karaivanova, P. Terziyska, S. K. Kolev, D. Karashanova, B. Georgieva, D. Dimov, V. Atanasov, E. P. Valcheva
Summary: The study found that UV-C irradiation had a significant impact on the structural quality of a-C:H and ta-C:H films, reducing the content of sp(3) and oxygen-containing radicals. The influence of UV-C light directed almost parallel to the films' surface on the structural quality of graphene-like films was slightly higher than that directed perpendicular.
SURFACES AND INTERFACES
(2021)
Article
Materials Science, Ceramics
Rajasekhar Bhimireddi, Lokeswararao Dhavala, Tukaram Shet, Sai Pavan Prashanth Sadhu, Kumara Raja Kandula, Anees A. Ansari, Jeevan Kumar Padarti
Summary: The physical properties and polarization switching ability of Sr2Bi4Ti5O18-ZnSnO3 composite ceramics were investigated, and it was found that the addition of ZnSnO3 can improve the electrical characteristics of the material.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Yao Yan, Yanan Fang, Jun Li, Yongqiang Yang, Fanrong Chen, Shijun Wu, Thomas Hooper, Ankit Jaiswal, Tim White
Summary: This article presents a new method to synthesize monoclinic nHAp from ACP at room temperature without crystallization inhibitors, and the use of Raman spectroscopy as a reliable technique to observe the crystallization process.
Article
Thermodynamics
Kosuke Shido, Mariko Noguchi, Ami Hayashi, Atsushi Nagoe, Hiroki Fujimori
Summary: The effect of precooling treatments on the phase behaviors of OHMBBA was investigated using DSC and DSC-XRD measurements. DSC-Raman spectroscopy was also performed to distinguish various crystalline phases and a glassy N phase. The results demonstrated the usefulness of DSC-Raman spectroscopy in detecting phase transitions and identifying phases.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Materials Science, Multidisciplinary
Mauro Andres Cerra Florez, Gemma Fargas Ribas, Jorge Luiz Cardoso, Antonio Manuel Mateo Garcia, Joan Josep Roa Rovira, Moises Bastos-Neto, Hamilton Ferreira Gomes de Abreu, Marcelo Jose Gomes da Silva
Summary: This research investigates the effect of aging treatments under different atmospheres on the surface layer of maraging 300 alloy, identifying that the oxide layer is mainly composed of magnetite, nickel ferrite, cobalt ferrite, and a small amount of hematite, with an adhesive force value of 99 mN, suitable for tribological applications.
Article
Pharmacology & Pharmacy
Adrian Krummnow, Andreas Danzer, Kristin Voges, Samuel O. O. Kyeremateng, Matthias Degenhardt, Gabriele Sadowski
Summary: The poor bioavailability of an API can be improved by dissolving it in a polymeric matrix through the formation of an amorphous solid dispersion (ASD). Crystallization and amorphous phase separation of the API can decrease its bioavailability. This study quantified the kinetics of water-induced amorphous phase separation in RIT/PVPVA ASDs and determined the compositions of the evolving amorphous phases using confocal Raman spectroscopy.
Article
Optics
Zeyu Chen, Christoph Krafft, Chunmin Zhang, Tanveer Ahmed Shaik, Juergen Popp
Summary: Introducing a channeled polarization Raman microscope (CPRM) that uses spectrally-modulated polarimetry. The CPRM modulates polarization information into a spectrum using an achromatic quarter-wave plate, a high order retarder, and a linear polarizer. The linear Stokes parameters of Raman scattered light can be decoded from this spectrum using Fourier transformation method (FTM). Compared to traditional polarization Raman microscope, CPRM eliminates the need of rotating the analyzer multiple times, thereby speeding up the data acquisition process. CPRM's feasibility and correctness are validated through experiments, showcasing its capabilities for molecular orientation characterization and enhanced image contrast using point and mapping spectroscopy modes.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Energy & Fuels
Jiuqing Li, Yong Qin, Yilin Chen, Jian Shen, Yu Song, Ziwei Wang
Summary: The evolution of coal into graphite during natural graphitization was traced by analyzing samples from Yongan coalfield, Fujian Province, China using XRD, Raman spectroscopy, and HRTEM. The results showed a sharp division and prominent evolution jump in the evolution process, with changes in crystallite size, structural defects, and the alignment of lattice fringes.
Article
Materials Science, Multidisciplinary
Chao Liu, Tielong Shen, Cunfeng Yao, Hailong Chang, Kongfang Wei, Lijuan Niu, Zhiwei Ma, Zhiguang Wang
Summary: The study found that a Si modified steel SIMP exhibited better oxidation resistance compared to T91 in 500 degrees C steam with a flow rate of 5 m/s, and the oxidation rate was significantly enhanced at relatively low dissolved oxygen levels. This suggested that not only alloy composition and dissolved oxygen, but also the flow rate, played important roles in the corrosion behavior of ferritic-martensitic steels.
Article
Chemistry, Applied
Benjamin Malfait, Laurent Paccou, Natalia T. Correia, Yannick Guinet, Alain Hedoux
Summary: A very unusual amorphous-amorphous two-step transformation of indomethacin confined within MCM-41 mesoporous silica was observed, involving the growth of gamma-nanocrystals followed by their transformation to an undercooled liquid state structurally different from the original liquid. The unstable nanocrystals were explained to be a result of high specific area imposed by geometrical confinement, with dissolution mechanism similar to digestive ripening.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Milica M. Vasic, Ivana Stojkovic Simatovic, Ljubica Radovic, Dragica M. Minic
Summary: Thermal treatment induces changes in phase composition and microstructural parameters of the alloy, which in turn affect its corrosion behavior in different solutions. In addition to phase composition, crystal orientation and the state of the alloy surface also play a significant role in overall corrosion behavior.
Article
Materials Science, Ceramics
Soham Das, Spandan Guha, Ranjan Ghadai, Ashis Sharma
Summary: This experimental investigation discusses the influence of different N2 gas flow rates on the properties of CVD TiN coatings, indicating that increasing flow rate leads to increased surface roughness, reduced crystallite size, decreased corrosion resistance, and reduced thermal expansion mismatch between Si substrate and TiN film. The mechanical properties of the film also reveal that hardness and Young's modulus increase with increasing N2 flow rate.
CERAMICS INTERNATIONAL
(2021)
Review
Materials Science, Multidisciplinary
Mikhail Shekhirev, Christopher E. Shuck, Asia Sarycheva, Yury Gogotsi
Summary: The field of MXene continues to grow as more research groups investigate this large class of 2D materials. While synthesis and applications have been widely discussed, the importance of characterization is often overlooked. This review focuses on various advanced characterization techniques for understanding the precursor suitability, successful synthesis, composition, structure, and properties of MXene.
PROGRESS IN MATERIALS SCIENCE
(2021)
Article
Pharmacology & Pharmacy
Yannick Guinet, Laurent Paccou, Alain Hedoux
Summary: Designing co-amorphous formulations is an effective strategy to improve the bioavailability of low-molecular-weight drugs. This study focused on analyzing the thermal stability of co-amorphous blends of indomethacin and amino acids, in order to understand the stabilization mechanism of the drug in its amorphous state. The results revealed the surprising capability of L-arginine to enhance the stability of amorphous indomethacin by strengthening its H-bond network.
Article
Chemistry, Physical
Alexander V. Bulgakov, Jiri Beranek, Vladimir A. Volodin, Yuzhu Cheng, Yoann Levy, Siva S. Nagisetty, Martin Zukerstein, Alexander A. Popov, Nadezhda M. Bulgakova
Summary: In this paper, the crystallization of silicon-germanium multilayer structures under ultrashort laser pulses at different wavelengths was investigated. It was found that selective crystallization of germanium can be achieved and mid-IR laser annealing showed better selectivity. The study provides insights into the energy absorption mechanisms and thermal effects during laser annealing.
Article
Chemistry, Physical
Mila N. Krstajic Pajic, Sanja I. Stevanovic, Vuk V. Radmilovic, Aleksandra Gavrilovic-Wohlmuther, Velimir R. Radmilovic, Snezana Lj. Gojkovic, Vladislava M. Jovanovic
APPLIED CATALYSIS B-ENVIRONMENTAL
(2016)
Article
Chemistry, Physical
A. H. Whitehead, T. J. Rabbow, M. Trampert, P. Pokorny
JOURNAL OF POWER SOURCES
(2017)
Article
Chemistry, Physical
Arjun Bhattarai, Nyunt Wai, Ruediger Schweiss, Adam Whitehead, Tuti M. Lim, Huey Hoon Hng
JOURNAL OF POWER SOURCES
(2017)
Article
Chemistry, Physical
Arjun Bhattarai, Nyunt Wai, Ruediger Schweiss, Adam Whitehead, Guenther G. Scherer, Purna C. Ghimire, Tam D. Nguyen, Huey Hoon Hng
JOURNAL OF POWER SOURCES
(2017)
Article
Materials Science, Coatings & Films
D. Yung, A. Zikin, I. Hussainova, H. Danninger, E. Badisch, A. Gavrilovic
SURFACE & COATINGS TECHNOLOGY
(2017)
Article
Chemistry, Physical
D. Tripkovic, S. Stevanovic, A. Gavrilovic, J. Rogan, U. Lacnjevac, T. Kravic, V. M. Jovanovic
Article
Chemistry, Physical
Tam D. Nguyen, Luyuan Paul Wang, Adam Whitehead, Nyunt Wai, Gunther G. Scherer, Zhichuan J. Xu
JOURNAL OF POWER SOURCES
(2018)
Article
Chemistry, Multidisciplinary
Tam D. Nguyen, Adam Whitehead, Nyunt Wai, Samuel Jun Hoong Ong, Gunther G. Scherer, Zhichuan J. Xu
Article
Energy & Fuels
Arjun Bhattarai, Nyunt Wai, Ruediger Schweiss, Adam Whitehead, Guenther G. Scherer, Purna C. Ghimire, Tuti M. Lim, Huey Hoon Hng
Article
Chemistry, Physical
M. N. Krstajic Pajic, S. I. Stevanovic, V. V. Radmilovic, A. Gavrilovic-Wohlmuther, P. Zabinski, N. R. Elezovic, V. R. Radmilovic, S. Lj. Gojkovic, V. M. Jovanovic
APPLIED CATALYSIS B-ENVIRONMENTAL
(2019)
Article
Electrochemistry
Sanja Stevanovic, Dusan Tripkovic, Aleksandra Gavrilovic-Wohlmuther, Jelena Rogan, Uros Lacnjevac, Vladislava Jovanovic
Summary: The PtSn/C catalyst shows better performance in CO tolerance and methanol oxidation reactions compared to PtSnO2/C catalyst, indicating the advantage of alloying Sn with Pt.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2021)
Article
Biotechnology & Applied Microbiology
Muhammad Adeel Ashraf, Markus Valtiner, Aleksandra Gavrilovic-Wohlmuther, Juliane Kampichler, Christian M. Pichler
Summary: Metallic zirconium has potential applications in engineering and corrosive industries. Ionic liquids are suitable for electrochemical reactions of zirconium. The interaction between ionic liquids and zirconium precursors influences the diffusion properties of zirconium.
FRONTIERS IN CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Arjun Bhattarai, Adam H. Whitehead, Ruediger Schweiss, Guenther G. Scherer, Maria Skyllas-Kazacos, Nyunt Wai, Tam D. Nguyen, Puma C. Ghimire, Moe Ohnmar Oo, Huey Hoon Hng
ACS APPLIED ENERGY MATERIALS
(2019)
Article
Electrochemistry
Arjun Bhattarai, Puma C. Ghimire, Adam Whitehead, Ruediger Schweiss, Guenther G. Scherer, Nyunt Wai, Huey Hoon Hng
Article
Chemistry, Physical
Thomas J. Rabbow, Adam H. Whitehead
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.