Article
Materials Science, Multidisciplinary
Jisen Yan, Zhihe Dou, Tingan Zhang
Summary: Spherical Ti6Al4V alloy powder was prepared successfully using calciothermic self-propagating rapid reaction method, showing characteristics of high purity, short production cycle, and environmental friendliness.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Andrea Skolakova, Jan Pinc, Pavel Novak
Summary: The preferential formation of phases in Ni-Al, Fe-Al, and Ti-Al systems was observed at the interface of solid-solid and solid-liquid phases. The favored formation was not associated with thermodynamic assumptions, but was caused by crystal structures of arisen phases. The lattice volumes of Ni2Al3, Fe2Al5, and Ti2Al5 phases are always smaller than that of NiAl3, FeAl3, and TiAl3 phases.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Metallurgy & Metallurgical Engineering
Xin-yu Zhou, Zhi-he Dou, Ting-an Zhang, Ji-sen Yan, Jian-peng Yan
Summary: An effective method for preparing low-oxygen Ti powder was reported, involving self-propagating high-temperature synthesis (SHS) process and electrodeoxidation in molten CaCl2. The experiments demonstrated the conversion of TiO2 to TiOx<1 powder, and the subsequent transformation of TiOx<1 powder to pure titanium powder through electrodeoxidation, with the shrinking of lattice.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Materials Science, Multidisciplinary
Jin-ru Han, Zhi-he Dou, Ting-an Zhang, Wang An
Summary: This study investigates the reduction behavior and slagging effect of Cr2O3 during the in-situ synthesis of CuCr alloy. The results show that increasing the dosage of Cr2O3 improves the separation of alloy and slag, and affects the density and properties of the alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Oliver Renk, Michael Tkadletz, Nikolaos Kostoglou, Ibrahim Emre Gunduz, Kamel Fezzaa, Tao Sun, Andreas Stark, Charalabos C. Doumanidis, Juergen Eckert, Reinhard Pippan, Christian Mitterer, Claus Rebholz
Summary: High pressure torsion is investigated as an alternative process to produce bulk nanocomposites with high reactivity, similar to those obtained from ball milling or magnetron sputtering. Samples deformed at ambient temperature can be ignited significantly below the Al melting point, consisting predominantly of Al3Ni2 and Al3Ni, independent of the applied strain. The reaction, although initiated at the edge of the disk, is not prevented by the strain gradient present in the disks.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Ana Romero, Gloria P. Rodriguez, Enrique Marjaliza
Summary: The processing of Ni-Al system intermetallic compounds using SHS-CSE method successfully obtained high-quality nickel parts by controlling the heating rate and time. The best results were achieved in the multilayer configuration of the Ni-Ni/Al-Ni system, which synthesized intermetallic compounds like Ni2Al3, NiAl, and Ni3Al.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Guiming Peng, Jian-Wen Zhao, Jiaqi Wang, Eli Hoenig, Suqin Wu, Mingzhan Wang, Mao He, Lei Zhang, Jin-Xun Liu, Chong Liu
Summary: In this study, molybdenum borides with low valence molybdenum as active sites were synthesized as electrochemical nitrogen reduction reaction (eNRR) catalysts, demonstrating high efficiency and selectivity for electrocatalytic ammonia production.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Materials Science, Multidisciplinary
Hairui Xing, Ping Hu, Jiayu Han, Shilei Li, Songwei Ge, Xingjiang Hua, Boliang Hu, Fan Yang, Kuaishe Wang, Pengfa Feng
Summary: This study investigates the effects of oxygen on the microstructure and evolution mechanism of molybdenum. The results show that with increasing oxygen content, more oxygen exists in the pores between molybdenum grains, leading to a change in the fracture mode. These findings provide new insights for controlling and regulating the properties of molybdenum.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2022)
Review
Crystallography
Santosh Sampath, Vignesh Pandian Ravi, Srivatsan Sundararajan
Summary: Nickel aluminides possess desirable properties for high-temperature applications, but the challenges of processing and machining hindered their benefits in the 1990s. However, advancements in manufacturing techniques, understanding of aluminide microstructure and deformation processes, and developments in micro-alloying have contributed to the progress of nickel aluminides. This paper provides a comprehensive overview of the key developments, manufacturing methods, and challenges in producing nickel aluminides, as well as their applications and current trends.
Article
Automation & Control Systems
Moises Felipe Teixeira, Jeferson T. Pacheco, Leandro J. da Silva, Alexsandro Rabelo, Milton Pereira, Carlos E. Nino
Summary: By laser cladding high manganese Hadfield steel with Metco 1030A alloy, the research aims to improve the wear resistance of grinding hammers. The coatings exhibit significantly higher hardness and wear resistance compared to the substrate, indicating the potential to increase the service life of Hadfield grinding hammers.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
N. N. Aghajanyan, S. K. Dolukhanyan, O. P. Ter-Galstyan, G. N. Muradyan, A. A. Hovhannisyan, A. B. Nalbandyan
Summary: The paper presents the results of Self-propagating High-temperature Synthesis (SHS) in ternary Ti-Al-C and quaternary 2xTi-2(1-x)Zr-Al-C (x=0.5-0.9) systems, conducted in argon and hydrogen environments. The influence of initial mixture composition on microstructure, phase composition, and crystallographic parameters of synthesized compounds was investigated. Rietveld analysis of X-ray diffraction patterns was used to calculate lattice parameters and quantitative phase composition. Combustion of Ti-Al-C system produced Ti2AlC and Ti3AlC2 MAX phases (85-89%), as well as TiCx phase (11-15%). Combustion of Ti-Zr-Al-C system, depending on Ti/Zr ratio, Al and C contents, resulted in the formation of main MAX phases (Ti2AlC, Ti3AlC2, Zr2AlC) and FCC carbides of transition metals.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Hong Yu Zhou, Yan Bin Qu, Jian Chen Li, Zhi Li Wang, Chun Cheng Yang, Qing Jiang
Summary: This study provides a theoretical design for improving the selectivity and activity of electrocatalytic nitrogen reduction reaction (NRR), offering new insights for green and effective ammonia synthesis.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Multidisciplinary
Zhenjie Liu, Pingping Chang, Murong Xi, Juan Ding, Xingchao Wang, Jiulin Wang, Wenjun Zhang, Yudai Huang
Summary: Designing efficient catalysts is crucial for the development of electrochemical synthesis technologies. In this study, a novel vacuum induction strategy is used to synthesize a nickel boride/nickel (Ni3B/Ni) heterostructure catalyst for the electrochemical oxidation of methanol. The catalyst exhibits high reactivity, ultra-high selectivity, and ultra-long life. Mechanistic studies suggest that the formation of *CH2O occurs most favorably in the Ni3B/Ni heterostructure.
Article
Chemistry, Physical
Zhengyu Wei, Qiang Zhao, Mengyuan He, Shilong Su, Yun Tian, Chengduo Wang, Songjie Li, Dehai Ping, Ben Jing, Guanjie Hu
Summary: This study reports a controllable self-propagating high-temperature synthesis process that converts a mixed powder of magnesium and zinc with CO2 into porous graphene. The prepared graphene exhibits a large specific surface area and excellent electrical conductivity, and shows superior capacitance performance in supercapacitors.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Chemical
R. A. Kornev, P. G. Sennikov, I. B. Gornushkin, A. A. Ermakov, V. E. Shkrunin, V. S. Polykov, A. R. Kornev, K. D. Kornev
Summary: Laser-induced dielectric breakdown was used to synthesize and deposit molybdenum borides under specific gas atmospheres. The emission spectra of the plasma and the dynamics of the gas discharge were investigated. A comparative analysis of the gas mixture before and after exposure to the plasma was conducted. The conditions and chemical reactions for the formation of molybdenum borides were determined. Different structures and sizes of molybdenum boride deposits were obtained.
PLASMA CHEMISTRY AND PLASMA PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
V. V. Gostishchev, I. A. Astapov, S. N. Khimukhin
INORGANIC MATERIALS
(2017)
Article
Engineering, Chemical
T. B. Ershova, N. M. Vlasova, M. A. Teslina, I. A. Astapov
THEORETICAL FOUNDATIONS OF CHEMICAL ENGINEERING
(2017)
Article
Chemistry, Multidisciplinary
Dmitry S. Shtarev, Vladimir K. Ryabchuk, Konstantin S. Makarevich, Anna V. Shtareva, Artem I. Blokh, Ivan A. Astapov, Nick Serpone
Article
Engineering, Electrical & Electronic
Nikolay G. Galkin, Konstantin N. Galkin, Sergey A. Dotsenko, Sergey A. Pyachin, Ivan A. Astapov
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2020)
Article
Materials Science, Multidisciplinary
Aleksey Zaitsev, Ivan A. Astapov
Summary: This article discusses the potential of obtaining regenerated photocatalytic materials of cylindrical shape for flow-through water purification systems. Two methods, cementation in a ceramic base matrix and laser fusion with a ceramic base of standard powder photocatalysts (ZnO, TiO2), were compared based on photocatalytic activity criteria. The materials obtained were tested in a flow-through water purification unit, showing efficiency in the photo-oxidation of model organic pollutants.
Article
Chemistry, Inorganic & Nuclear
A. Shtareva, D. S. Shtarev, M. Balanov, V. O. Krutikova, I. A. Astapov
Summary: The photocatalytic properties of heterostructures composed of various strontium bismuthates and bismuthyl carbonate were investigated. Enhanced photocatalytic activity was observed in SrxBiyOz/(BiO)2CO3 heterostructures for different strontium bismuthates. The increased photocatalytic activity in this type of heterostructure was attributed to type II heterojunctions.
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
(2022)
Article
Geosciences, Multidisciplinary
N. V. Berdnikov, V. G. Nevstruev, P. K. Kepezhinskas, V. O. Krutikova, N. S. Konovalova, I. A. Astapov
Summary: Various microspherules including silicate, Fe-oxide, and Cu-Au-Ag are found in the Kostenga deposit in the Lesser Khingan region of Far East Russia, believed to form due to rapid uplift and degassing of ore-silicate melts. The presence of these microspherules provides valuable insights into the possible volcanic formation and precious metal mineralization processes in such deposits.
RUSSIAN JOURNAL OF PACIFIC GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Nikolai Berdnikov, Victor Nevstruev, Pavel Kepezhinskas, Ivan Astapov, Natalia Konovalova
Summary: This study presents new data on gold alloys in iron oxide deposits in the Lesser Khingan Range of the Russian Far East, shedding light on the behavior of gold during the differentiation of metal-rich silicate melts and the mechanisms of gold alloy formation. The research indicates a possible connection between iron-oxide mineralization and the formation of Cu-Ag-Au spherules, possibly involving silicate-metallic immiscibility and explosive volcanism, suggesting that gold alloys formed in deep roots of arc volcanoes might serve as an exploration guide for high-grade epithermal gold mineralization at shallow structural levels of hydrothermal-volcanic environments.
Article
Materials Science, Multidisciplinary
V. V. Gostishchev, E. D. Kim, S. N. Khimukhin, E. H. Ri
INORGANIC MATERIALS
(2019)
Article
Engineering, Chemical
T. B. Ershova, N. M. Vlasova, M. A. Teslina, I. A. Astapov
THEORETICAL FOUNDATIONS OF CHEMICAL ENGINEERING
(2018)
Article
Materials Science, Ceramics
A. A. Burkov, S. A. Pyachin, I. A. Astapov
GLASS PHYSICS AND CHEMISTRY
(2018)
Article
Engineering, Chemical
K. S. Makarevich, A. Zaitsev, O. Kaminsky, E. A. Kirichenko, I. A. Astapov
INTERNATIONAL JOURNAL OF CHEMICAL ENGINEERING
(2018)
Article
Metallurgy & Metallurgical Engineering
Alexander Burkov, Sergey Pyachin', Nuria Vlasova', Ivan Astapov, Maria Kulik
OBRABOTKA METALLOV-METAL WORKING AND MATERIAL SCIENCE
(2018)
Article
Materials Science, Multidisciplinary
V. V. Gostishchev, I. A. Astapov
LETTERS ON MATERIALS
(2017)
