Article
Materials Science, Ceramics
Evangelos Daskalakis, Andrew Scott, Animesh Jha
Summary: The effect of vibration ball milling on the particle size reduction and reactivity enhancement of Al-TiO2-B2O3 powder mixture is investigated in this study. The results show that vibration ball milling can produce Al microparticles with a size below 64 μm, coated with nano-particles of TiO2 and B2O3. The longer the milling time, the lower the reaction temperature and the better the density and skeletal performance of the synthesized Al2O3-TiB2 matrix.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Roberto Ademar Rodriguez-Diaz, Jesus Porcayo-Calderon, Jose Luis Reyes Barragan, Cinthya Dinorah Arrieta-Gonzalez, Nestor Belisario Gomez-Guzman, Ivan Daniel Plasencia Gonzalez
Summary: The synthesis of an Al-Cr alloy system by non-equilibria processes is of interest due to the formation of metastable or quasicrystalline phases during rapid solidification. This research investigated the ball milling process of a mixture of Cr and Al powders, followed by the consolidation process. X-ray diffraction analyses showed no formation of metastable or quasicrystalline phases during milling. The nanometric grain size decreased as milling time increased, and this decrease continued after the sintering treatment.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Multidisciplinary
A. Pukenas, P. Chekhonin, J. Scharnweber, R. Chulist, C-G Oertel, J. Freudenberger, W. Skrotzki
Summary: In this study, multi-layered Ti/Al sheets underwent a two-step heat treatment to form intermetallic compounds. The first step involved Ti-rich samples being held at 600 degrees C for 12 hours with Al being consumed to form mainly Al-rich intermetallic phases. The second step resulted in the formation of TiAl and Ti3Al as major phases under high-temperature annealing conditions.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Engineering, Chemical
Shashank Vummidi Lakshman, John D. Gibbins, Timothy P. Weihs
Summary: This study investigates the impact of milling duration on the size, microstructure, and properties of different Al-Mg-Zr composite powders, revealing that refinement of Zr inclusions and reduction in average size can lead to lower ignition temperatures.
Article
Nanoscience & Nanotechnology
Peihao Ye, Xuewen Li, Hao Wu, Kesong Miao, He Wu, Rengeng Li, Chenglu Liu, Chongxiang Huang, Wenbin Fang, Guohua Fan
Summary: A novel TiAl alloy with two alternately distributed components has been successfully prepared, showing high strength and unprecedented strain. The unique bicomponent structure activates mechanical twins, twin intersections, and high-density superdislocation, resulting in strain hardening and a synergy between strength and ductility. This study provides a new strategy for preparing TiAl alloys with excellent properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Ceramics
Hojun Lee, Si Yeon Kim, Young-In Lee, Jongmin Byun
Summary: This study verifies the advantages of synthesizing Ti-Al-C MAX phases using intermetallic compounds instead of elemental powders. Diffusion experiments show that Ti2AlC is produced at 1000 degrees C and Ti3AlC2 at 1300 degrees C when intermetallic compounds are used, while Ti2AlC is produced at 1300 degrees C and Ti3AlC2 at 1400 degrees C when using elemental powder. Heat treatment at 1400 degrees C for 3 hours decreases Ti3AlC2 content and increases Ti2AlC when elemental powder is used, but increases Ti3AlC2 content when intermetallic compounds are used.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Liangliang Zhang, Honggang Dong, Peng Li, Baosheng Wu, Yueting Ma, Libing Huang, Chao Li, Jiachen Li
Summary: This study aims to replace Ni-based alloy with TiAl intermetallic in assemblies. The quantitative relationship between lattice distortion, grain boundary, dislocation density, and the mechanical properties of the joints were investigated. The results showed that by using TiAl intermetallic, higher shear strength and improved performance of the joints were achieved.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Engineering, Chemical
Traian Florin Marinca, Andrei Ioan Sule, Razvan Hirian, Argentina Niculina Sechel, Florin Popa, Bogdan Viorel Neamtu, Ionel Chicinas
Summary: A new alloy, Al-Permalloy, was successfully obtained by mechanical alloying method using elemental powders. The ball to powder ratio (BPR) influenced the synthesis time and characteristics of the alloy. The alloy exhibited a FCC single phase structure and the particle morphology and size varied with different BPRs. The Curie temperature and saturation magnetization of the alloy were affected by the synthesis conditions and BPR. Various characterization techniques were employed to analyze the powder characteristics.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Engineering, Chemical
Ivan A. Ditenberg, Denis A. Osipov, Michail A. Korchagin, Ivan Smirnov, Konstantin Grinyaev, Alexander I. Gavrilov
Summary: In this study, the changes in morphology, structural-phase state and microhardness of 3Ni-Al powder mixture after different duration of high-energy ball-milling were investigated. Three main stages of structural-phase state evolution were identified, with differences in morphology, component distribution, phase compositions, and microhardness changes observed with varying treatment durations. It was found that the synthesis of intermetallic Ni3Al and NiAl phases begins at lower temperatures than indicated in the phase diagram under high-energy ball-milling conditions. Additionally, an increase in milling duration led to a transformation of phase composition, ultimately affecting the strengthening level of the powder mixture.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Junhong Jia, Songsong Han, Guang Yang, Liang Cheng, Xiaoxiao Yang, Junxian Zuo, Wenpeng Bai, Ganyu Bai
Summary: Ti-40Al-10V alloys with nearly lamellar structure (HIPed) and refined (B2+gamma) microstructure (HT) were studied for their tribological behavior at elevated temperatures. The study revealed that HIPed samples exhibited low friction coefficients due to high ratios of TiO2/Al2O3, while HT samples showed improved wear resistance because of the closely adhered oxide film.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Chemistry, Physical
E. G. Volkova, K. A. Kozlov, B. D. Antonov, A. M. Murzakaev, V. A. Zavalishin, A. A. Livinets, Volkov A. Yu
Summary: A mixture of fine powder of the Al2Au intermetallic compound and coarse Cu-powder was processed by ball milling technique. The phase composition and microstructure were studied through TEM, SEM, and XRD methods, revealing the formation of Cu-clusters and a decrease in lattice parameter of Al2Au-phase. The resulting powder had a crystallite size near 20 nm, and its mechanical properties were evaluated using nanoindentation tests.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Yun-lei Gao, Shu-qing Kou, Jun-nan Dai, Zhi-fa Wang, Shi-li Shu, Shuang Zhang, Feng Qiu, Qi-chuan Jiang
Summary: TiAl-5wt.%Ti2AlC-3wt.%Mn composites with a novel microstructure were fabricated by adding Mn and in situ synthesized Ti2AlC nanoparticles. The interface between nanoparticles and the TiAl matrix maintained a stable combination, leading to grain refinement in the composites. The properties of the composites were improved mainly by thermal mismatch strengthening, Orowan strengthening, grain refinement strengthening, and solid solution strengthening, resulting in a significant increase in strength and ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Chemical
Oguzhan Cuvalci, Temel Varol, Serhatcan Berk Akcay, Onur Guler, Aykut canakci
Summary: Cp-Ti particles were fabricated from titanium turning chips by wet-pre milling assisted mechanical milling, with different ball to powder ratios and milling times. The smallest particle size was achieved with a ball to powder weight ratio of 15:1, which was approximately 15 times smaller than powders produced with a ratio of 5:1. XRD analysis showed the presence of TiO2 (Anatase and Rutile) peaks in the structure of Cp-Ti particles fabricated after 4 hours of milling with a ball-to-powder ratio of 15:1. However, oxidation was not observed in the results of XRD analysis for milling with low ball to powder ratios (5:1 and 10:1). The lowest apparent density and hardness were measured at 2.45 g/cm3 and 126 HV, respectively, for powders milled for 0.5 hours. The highest apparent density and hardness were measured at 3.45 g/cm3 and 325 HV, respectively, for powders milled for 7 hours.
Article
Chemistry, Multidisciplinary
Roberto Ademar Rodriguez Diaz, Sergio Ruben Gonzaga Segura, Jose Luis Reyes Barragan, Victor Ravelero Vazquez, Arturo Molina Ocampo, Jesus Porcayo Calderon, Hector Cruz Mejia, Carlos Alberto Gonzalez Rodriguez, Jesus Israel Barraza Fierro
Summary: A nano-composite material of nanostructured Al-based matrix reinforced with Fe40Al intermetallic particles was successfully produced by ball milling, showing promising microstructural and mechanical properties for applications in automotive and aeronautical industries. The hardness of the material linearly increased with the concentration of Fe40Al intermetallic phase, indicating potential for use in demanding industrial sectors. The study highlights the importance of non-equilibria processing in achieving uniform dispersion and enhanced properties of aluminum matrix composite materials.
APPLIED SCIENCES-BASEL
(2021)
Article
Materials Science, Multidisciplinary
Nagarajan Thiyaneshwaran, Chithirai Pon Selvan, Avinash Lakshmikanthan, Katakam Sivaprasad, Balasubramanian Ravisankar
Summary: This study compares Ti/Al and Ti/Ni metal intermetallic laminates (MILs) and finds that both have specific strength, but Ti/Al MILs have lower density values than Ti/Ni laminates.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Jianying Wang, Jianpeng Zou, Hailin Yang, Xixi Dong, Peng Cao, Xiaozhou Liao, Zhilin Liu, Shouxun Ji
Summary: Superior mechanical properties have been achieved in a coarse-grained single-phase face-centered cubic (fcc) medium-entropy alloy (MEA) by carefully designing multi-scale heterogeneous structures. The alloy exhibits high ultimate tensile strength and fracture strain, mainly attributed to the favorable heterogeneous fcc matrix, coherent spherical precipitates, and a high density of crystalline defects.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Jingfan Zhang, Dengshan Zhou, Xueyong Pang, Bowen Zhang, Yue Li, Binhan Sun, Ruslan Z. Valiev, Deliang Zhang
Summary: By manipulating the grain size and alloying with yttrium, we have achieved the simultaneous formation of deformation twins and 9R structure in an Al-Mg alloy. Our study presents a new microstructure design strategy for strengthening bulk aluminum alloys through deformation twins and 9R structure and/or stacking faults.
Article
Materials Science, Multidisciplinary
Kumar Debajyoti Jena, Xin Song, Keemi Lim, Ying Xu, Lu Li, Peng Cao
Summary: A simple two-step method for preparing nanostructured Li4Ti5O12 (LTO), a promising anode material for lithium-ion batteries (LIBs), was reported. The synthesised LTO exhibited a cubic spinel structure with Fd3m space group. The final powder obtained had a faceted polyhedral shape with an average particle diameter of 68 nm. The LTO showed good rate capability when tested in half cells, delivering specific capacities in the range of 131.9-149.1 mAh g(-1) at various rates, and maintaining a reversible discharge capacity of 96.8 mAh g(-1) after 100 cycles.
EMERGENT MATERIALS
(2023)
Article
Chemistry, Physical
Xiaogang Wu, Bowen Zhang, Yanhu Zhang, Hongzhi Niu, Deliang Zhang
Summary: Powder metallurgy (PM) Ti-6Al-2Sn-4Zr-2Mo-0.1Si-(0, 2, 4)W (wt%) alloys with different W contents were fabricated and their microstructure and mechanical properties were studied. The addition of W changed the microstructure from parallel alpha/beta lamellar colonies to an interwoven alpha/beta t microstructure. The presence of W led to an increase in tensile strength but a decrease in ductility.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Zhigang Xu, Dayong Shen, Kai Wang, Peng He, Jian Zhang, Hao Zhang, Peng Cao, Shangyu Huang, Jian Peng, Qiang Shen, Chuanbin Wang, Lianmeng Zhang
Summary: In this study, a novel Al foam with a periodic structure consisting of hierarchical porous and bi-directional composition-graded structures was synthesized using a simple powder metallurgical route. The addition of Mg powders resulted in excellent metallurgical bonding between the Al powders and the hollow tubes. The Al foam with Mg addition exhibited superior compression performance, with higher plateau stress and energy absorption capacity in the y-axis compared to the x-axis due to its anisotropic structure.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Xin Song, Tianhang Zhang, Saifang Huang, Jinshuo Mi, Yudong Zhang, Jadranka Travas-Sejdic, Adrian Peter Turner, Wei Gao, Peng Cao
Summary: This study constructed a high-safety composite solid-state electrolyte (CSSE) by embedding high ionic conductivity garnet type Li6.5La3Zr1.5Ta0.1Nb0.4O12 (LLZTNO) powder into a polyvinylidene fluoride (PVDF) matrix. The CSSE with 10% LLZTNO achieved an ionic conductivity of 1.05 x 10-4 S cm-1 and extended electrochemical window to 4.80 V vs Li/Li+. The evolution and composition of the SEI layer were characterized using in-situ optical microscopic observation, X-ray photoelectron spectroscopy, and cryogenic electron microscopy (cryo-EM). When paired with an NCM811 cathode, the CSSE batteries exhibited good rate cycling performance and maintained discharge capacity at 137.1 and 91.2 mAh g-1 at 0.3C and 2C after 80 and 100 cycles. The needle penetration test further demonstrated the superior safety and potential applications of PVDF-based room-temperature CSSE batteries.
JOURNAL OF POWER SOURCES
(2023)
Article
Nanoscience & Nanotechnology
Youyun Zhang, Lei Meng, Xiaoli Zhao, L. De Los Santos Valladares, A. Bustamante Dominguez, Deliang Zhang
Summary: Powder metallurgy Fe-22Mn (wt.%) steel rods were fabricated, and their microstructures and tensile properties were investigated. Increasing the extrusion ratio resulted in significant changes in the volume fractions of different phases, leading to changes in yield strength and strain hardening capacity. Annealing at 1200°C caused segregation of Fe atoms in the Fe-Mn oxide particles, resulting in decreased hardness and Young's modulus, and reduced ductility.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Metallurgy & Metallurgical Engineering
Keemi Lim, Muhammad Dilawer Hayat, Kumar Debajoyti Jena, Wen Zhang, Lu Li, Peng Cao
Summary: Obtaining a homogenous metal injection moulding (MIM) feedstock blend is challenging due to the different characteristics of each of the multiple polymers. This study focuses on the effects of different compatibilisers on the interactions in POM and PP blends. The results show that the binder system based on EGMA-3 demonstrates the lowest contact angle and best miscibility for the POM/PP blends, indicating its excellent properties for MIM feedstocks.
Article
Chemistry, Physical
Zhen Zhang, Jiamiao Liang, Tian Xia, Yuehuang Xie, Sammy Lap Ip Chan, Jun Wang, Deliang Zhang
Summary: An AA6061 aluminum alloy tube was fabricated via thermomechanical consolidation. The microstructure evolution, formation of oxide particles, and tensile mechanical properties were investigated. It was found that fine Al/Mg oxide particles inhibited grain growth and led to the formation of a microstructure consisting of coarse elongated grains and fine equiaxed grains. T6 heat treatment resulted in a microstructure with finer grains. Good combination of strength and ductility was achieved in the heat treated samples due to high-quality bonding and inhibition of crack growth by the oxide particles.
Article
Materials Science, Multidisciplinary
Jianzhong Wang, Aoyun Liu, Qingbo Ao, Chen Wu, Jun Ma, Peng Cao
Summary: This paper investigates the energy absorption properties and mechanisms of porous titanium. Porous titanium with a porosity higher than 58% was prepared using the cold isostatic pressing (CIP) process with NaCl as a space holder. The optimal choice of porous titanium was identified based on the compressive strain rate and relative density. It was found that the energy absorption capacity of porous titanium increases with strain, but decreases rapidly with increasing porosity at a certain strain. The porosity of porous titanium should be less than 73.0% for greater energy absorption. Additionally, the Young's modulus and plateau stress of porous titanium can be expressed using a power law relationship with relative density.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Electrochemistry
Zhenghang Zhang, Rongzheng Fan, Saifang Huang, Jie Zhao, Yudong Zhang, Weiji Dai, Cuijiao Zhao, Xin Song, Peng Cao
Summary: This study proposes an integrated design of a double-layer functional composite electrolyte and cathode, which improves interfacial contact and increases cycle stability. The design establishes a continuous network for the transport of Li+ on the interface, optimizing the stability of the electrodes. The experimental results demonstrate that the design enables stable cycling of the battery under high current density and high temperature conditions.
Article
Nanoscience & Nanotechnology
Xize Chen, Shanghai Wei, Yigang Yan, Fanglei Tong, Geoffrey I. N. Waterhouse, Tilo Sohnel, Mark P. Taylor, Peng Cao
Summary: Magnesium rechargeable batteries (MRBs) are attracting attention due to their low cost, high safety, and high theoretical volumetric capacity. The use of eutectic and hypereutectic Mg-Sn alloys as anodes for MRBs was explored. The alloys exhibited unique microstructures and the dissolution processes were studied in an all-phenyl-complex (APC) electrolyte. Hypereutectic alloys showed better battery performance due to their superior mechanical properties.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Yifei Luo, Yuehuang Xie, Zhen Zhang, Jiamiao Liang, Deliang Zhang
Summary: A Ti-6Al-4V alloy with a dual harmonic structure was successfully fabricated by controlling grain sizes and element contents. This structure helps reduce mechanical mismatch and enhances strength and ductility.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Inorganic & Nuclear
Kai Zhao, Zhihong Ma, Li Yin, Bin Hui, Han Si, Xinlin Tong, Huidong Tang, Peng Cao, Saifang Huang
Summary: This paper reports a highly efficient blue-emitting phosphor with superior thermal stability, which has great potential for solid-state lighting applications.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Inorganic & Nuclear
Kai Zhao, Li Yin, Zhihong Ma, Tingxuan Yang, Huidong Tang, Peng Cao, Saifang Huang
Summary: The study investigated the solid-solution limit and thermal stability of Rb2CaP2O7:Eu2+ phosphors by cation substitution with Sr2+. It was found that substituting Sr can fine-tune the photoluminescence and mitigate thermal quenching, with 20% Sr substitution significantly improving the thermal stability by 1.64 times compared to Rb2CaP2O7:Eu2+. Cation substitution is an effective approach for enhancing the luminescence properties of phosphors.
INORGANIC CHEMISTRY
(2022)
