Article
Materials Science, Multidisciplinary
Qiang Wang, Zhao-Hui Zhang, Luo-Jin Liu, Xiao-Tong Jia, Yang-Yu He, Yuan-Hao Sun, Xing-Wang Cheng
Summary: TiB/Ti6Al4V composite was prepared using spark plasma sintering followed by bidirectional reaction hot rolling. TiB whiskers were synthesized in situ during the rolling process, achieving high strength and ductility in the composite.
MATERIALS CHARACTERIZATION
(2023)
Article
Chemistry, Multidisciplinary
Ying Song, Weiwei Liu, Yufeng Sun, Shaokang Guan, Yao Chen
Summary: The titanium alloy composite reinforced with graphene oxide nanosheets achieved weight reduction and strength improvement, showing a better overall performance.
Article
Nanoscience & Nanotechnology
Lihong Liu, Koji Morita
Summary: By using a simple one step spark-plasma-sintering (SPS) process to form a fine-grained Al2O3 layer on MgAl2O4, transparent MgAl2O4/Al2O3 laminated composites with an in-line transmission higher than 40% and a hardness of 29.1 GPa can be obtained. This composite structure demonstrates better mechanical properties compared to traditional monolithic materials.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
Samson Olaitan Jeje, Mxolisi Brendon Shongwe, Nthabiseng Maledi, Azeez Lawan Rominiyi, Olanrewaju S. Adesina, Peter Apata Olubambi
Summary: In this study, TiN nanoceramic reinforced Ti-7Al-1Mo composite was fabricated using spark plasma sintering technique to enhance its mechanical properties. The addition of nanoTiN reinforcement significantly improved the hardness and compressive yield strength of the material, indicating great potential for load-bearing applications.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Chemistry, Physical
Jiang Wu, Xuguang An, Jing Zhang, Shaofeng Lei, Yi Guo, Xiwei Xu, Weitang Yao, Qingyuan Wang, Qingquan Kong
Summary: Ti-24Nb-4Zr-3Mn alloys were prepared using mechanical alloying and spark plasma sintering. The study found that increasing the milling time reduces the particle size of the alloy powder, but increases the oxygen content. Among all the investigated alloys, Ti-24Nb-4Zr-3Mn alloy prepared by 20-hour milling showed excellent comprehensive mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Dariusz Garbiec, Alexander M. Laptev, Volf Leshchynsky, Maria Wisniewska, Pawel Figiel, Anna Biedunkiewicz, Piotr Siwak, Jan Raethel, Johannes Poetschke, Mathias Herrmann
Summary: The sintering process of WC-Ti powder mixtures with different titanium contents was investigated, and it was found that the phase composition and microstructure of the samples varied with different titanium contents. The sample with 5% titanium showed the best combination of hardness and fracture toughness.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Zekun Zheng, Zhaohui Zhang, Longlong Dong, Guodong Sun, Junjie Xu, Mingjia Li, Linbo Li, Yusheng Zhang
Summary: Investigated the effects of TiC generated in situ from different carbon sources on the interfacial structure and mechanical properties of Ti60 alloy. ACNS and rGO reacted with Ti60 matrix to form TiC, facilitating interfacial bonding. GNPs were not completely reacted with Ti60 matrix and resulted in interfacial structure defects. ACNS/Ti60 and rGO/Ti60 composites exhibited higher mechanical properties than GNPs/Ti60 composites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Yanfei Yin, Wenjuan Kou, Yongqing Zhao, Wangtu Huo, Weidong Zeng
Summary: The laminated Ti/Ti-50Nb composite, fabricated using spark plasma sintering, demonstrates a favorable combination of strength and ductility. The layered structure helps alleviate strain localization and maintains the total elongation of the composite equivalent to that of pure Ti. The tensile strength and stress-strain curves of the composite can be analyzed using the rule of mixture. Furthermore, microvoids initiate and grow at the interface, leading to the separation of the laminated structure into smaller units.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Qiang Wang, Zhao-Hui Zhang, Tie-Jian Su, Xing-Wang Cheng, Xian-Yu Li, Shun-Zhong Zhang, Jian-Ye He
Summary: TiB/Ti-6Al-4V composites with controllable orientation were synthesized by powder consolidation and hot extrusion, showing excellent tensile strength and elongation due to the distribution of TiB whiskers along the extrusion direction.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Review
Automation & Control Systems
Azeez Lawan Rominiyi, Peter Madindwa Mashinini
Summary: Titanium matrix composites reinforced with discontinuous ceramics and carbonaceous materials have gained attention for their exceptional properties such as heat and wear resistance, lightweight, high specific strength, and stiffness. This study provides a detailed overview of the microstructural, mechanical, wear, and oxidation characteristics of spark plasma sintered discontinuously reinforced titanium matrix composites, and offers information and research directions for further development. The determination of critical reinforcement fractions and establishment of suitable processing techniques are crucial for advancing the properties and expanding the applications of these composites.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Chemistry, Physical
Zohre Ahmadi, Mehdi Shahedi Asl, Mohammad Zakeri, Mohammad Farvizi
Summary: In this study, the influence of TiN addition on ZrB2-SiC composite was investigated. The addition of TiN increased the porosity content, resulting in a decrease in flexural strength but an increase in indentation fracture toughness and Vickers hardness.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Niraj Chawake, Lavanya Raman, Parthiban Ramasamy, Pradipta Ghosh, Florian Spieckermann, Christoph Gammer, B. S. Murty, Ravi Sankar Kottada, Juergen Eckert
Summary: This study synthesized a composite of two different medium entropy alloys using ball milling and spark plasma sintering, showing excellent microstructural and phase stability as well as multiple desirable mechanical properties. The results can serve as a template for other systems and demonstrate the feasibility of combining different medium entropy alloys.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Ceramics
Lanqing Liang, Boxin Wei, Dong Wang, Wenbin Fang, Lei Chen, Yujin Wang
Summary: Dense (Zr, Ti) (C, N) ceramics with improved mechanical properties were fabricated by spark plasma sintering using ZrC, TiCN, and ZrH2 powders.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Zhiju Zhao, Chenglin Wang, Liqin Yang, Yanping Cheng, Zhenyu Cai, M. Zarezadeh Mehrizi
Summary: In this study, a NiAl/TiC0.95 composite was synthesized through reactive spark plasma sintering of mechanically activated elemental powders. The microstructure and properties of the activated powders and sintered samples were evaluated. The results showed that after 10 hours of mechanical activation, Ni3Al and Ni2Al3 were eliminated from the sintered powder, leaving only NiAl and TiC0.95.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Tomila M. Vidyuk, Dina Dudina, Michail A. Korchagin, Alexander Gavrilov, Arina Ukhina, Uliana E. Bulanova, Mikhail A. Legan, Aleksey N. Novoselov, Maksim A. Esikov, Alexander G. Anisimov
Summary: This article presents the features of in-situ synthesis, microstructure evolution, and mechanical properties of TiC-Cu composites obtained by mechanical milling and spark plasma sintering (SPS). Different carbon sources were compared for their influence on the composite mixtures, with the conclusion that carbon black and nanodiamonds facilitate faster conversion of reactants compared to graphite. The TiC-Cu composite obtained showed a relative density of 95%, impressive strength and hardness properties, and an unconventional microstructure.
SURFACES AND INTERFACES
(2021)
Article
Engineering, Multidisciplinary
Bukola Joseph Babalola, Ojo Jeremiah Akinribide, Olukayode Samuel Akinwamide, Peter Apata Olubambi
Summary: The study investigated the mechanical and tribological characteristics of Ni-17Cr-10X ternary alloy systems developed via spark plasma sintering. The Ni-17Cr10Mo alloy exhibited the highest indentation hardness value, elastic modulus value, and wear resistance, while Ni-17Cr10W possessed the least mechanical and wear properties. The SPS technique was shown to be efficient in developing nickel-based alloys without defects such as segregation of alloying elements, as evidenced by scanning electron microscopy micrographs.
WORLD JOURNAL OF ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Thato Sharon Tshephe, Samuel Olukayode Akinwamide, Eugene Olevsky, Peter Apata Olubambi
Summary: Titanium and its alloys have been proven to be outstanding in various industries due to their enhanced properties, with different types of additive manufacturing techniques being frequently used for their fabrication. Laser-assisted 3D technology is found to be the most effective method for achieving enhanced densification.
Review
Materials Science, Multidisciplinary
Mary A. Awotunde, Adewale O. Adegbenjo, Olusegun O. Ajide, Peter A. Olubambi
Summary: The applications of carbon allotrope-reinforced Ti-based composites have expanded significantly, but there is still controversy regarding the process of in-situ TiC formation, its position within the composite, and its impact on the properties. This study aims to review previous research to broaden the understanding of this important area of interest.
CRITICAL REVIEWS IN SOLID STATE AND MATERIALS SCIENCES
(2023)
Article
Materials Science, Ceramics
Azeez Lawan Rominiyi, Peter Madindwa Mashinini
Summary: Monolithic pure Ti and Ti-6Ni-xTiCN composites were fabricated using spark plasma sintering method and their mechanical and anti-wear characteristics were investigated using nanoindentation technique. Microstructural analysis showed alpha-Ti phase in pure Ti matrix, while composites contained alpha-Ti phase as well as in-situ TiN, Ti2Ni intermetallic, and undissolved TiCN phases. Nanoindentation results showed increased hardness, elastic modulus, and elastic recovery index with increasing reinforcement contents. Ti-6Ni-xTiCN composites exhibited better wear and impact resistance compared to pure Ti. Ti-6Ni-10TiCN composite showed the optimum combination of nanomechanical and anti-wear properties under applied loads.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Oluwasegun Eso Falodun, Samuel Ranti Oke, Samuel Olukayode Akinwamide, Olawale Olarewaju Ajibola, Abdullahi Olawale Adebayo, Sunday Gbenga Borisade, Adeolu Adesoji Adediran, Peter Apata Olubambi
Summary: This study investigates the influence of ceramic (TiN and TiB2) particles on the densification, microstructure, wear, and nanoindentation behavior of titanium matrix composites produced by spark plasma sintering. The results show that the addition of TiN and TiB2 reduces the relative density of the composite, but increases the microhardness and wear resistance.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Metallurgy & Metallurgical Engineering
Miltia Lesufi, Samuel Olukayode Akinwamide, Washington Makoana, Lerato Tshabalala, Peter Apata Olubambi
Summary: This study investigates the microstructural, nanomechanical, and corrosion behavior of different sections of 410 steel fabricated via directed energy deposition technique. The results showed minimal pores in the specimens, suggesting improved density in the layer-by-layer built specimens. The top specimen exhibited the lowest corrosion resistance.
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2023)
Article
Energy & Fuels
Olusola Olaitan Ayeleru, Joshua Adeniyi Adeniran, Sula Bantubakhona Kwesi Ntsaluba, Lanrewaju Ibrahim Fajimi, Peter Apata Olubambi
Summary: One of the major issues faced by many developing countries, including South Africa, is the insufficient generation capacity of electricity, leading to frequent power cuts and high usage costs. This study aims to estimate the cost analysis of electricity usage at the University of Johannesburg residences and propose an energy-efficient model for not only the university but also other South African universities. Through analyzing the tariffs from 2015 to 2021, a five-year forecast using a non-linear autoregressive exogenous neural network (NARX-NN) model was made. The results show that the NARX-NN model studied has a root mean squared error (RMSE) of 2.47 x 10(5) and a determination coefficient (R2) of 0.9661. The projection also indicates that the annual cost of energy consumption will continue to increase, with an estimated peak in 2022 of over ZAR 30 million (USD 2,076,268).
Article
Automation & Control Systems
Samuel Olukayode Akinwamide, Mabontle Maleka, Nthabiseng Motabeni, Ojo Jeremiah Akinribide, Falodun Eso Oluwasegun, Peter Apata Olubambi
Summary: This research focuses on the characterization of microstructure and evaluation of nanomechanical properties of hybrid aluminium-based composites, which were fabricated by reinforcing pure aluminium matrix with zirconia and ferrotitanium particles. The results show that mixing and sintering the admixed powders at high temperature resulted in the formation of new phases, leading to improved mechanical performance of the composites. Nanoindentation test confirmed the homogeneous dispersion of reinforcement particles. The composites reinforced with 5% TiFe and 5% ZrO2 exhibited the most improved mechanical properties.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Review
Automation & Control Systems
Azeez Lawan Rominiyi, Peter Madindwa Mashinini
Summary: Titanium matrix composites reinforced with discontinuous ceramics and carbonaceous materials have gained attention for their exceptional properties such as heat and wear resistance, lightweight, high specific strength, and stiffness. This study provides a detailed overview of the microstructural, mechanical, wear, and oxidation characteristics of spark plasma sintered discontinuously reinforced titanium matrix composites, and offers information and research directions for further development. The determination of critical reinforcement fractions and establishment of suitable processing techniques are crucial for advancing the properties and expanding the applications of these composites.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Nondumiso Prudence Msweli, Samuel Olukayode Akinwamide, Peter Apata Olubambi, Babatunde Abiodun Obadele
Summary: A study on the biocorrosion response of spark plasma sintered Ti6Al7Nb alloy reinforced with yttria stabilized zirconia (YSZ) in Hank's solution was conducted. The addition of YSZ greatly influenced the microstructural changes and increased the microhardness of the composites. In terms of corrosion resistance, the Ti6Al7Nb + YSZ composites generally showed higher resistance except for Ti6Al7Nb + 1YSZ, which demonstrated a significant drop in corrosion potential and corrosion current density. The combination of mechanical properties and corrosion resistance suggests that the Ti6Al7Nb + YSZ alloy could be a promising material for dental implants in the future.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Ceramics
Oluwasegun Eso Falodun, Samuel Ranti Oke, Olukayode Samuel Akinwamide, Peter Apata Olubambi
Summary: The impacts of Cr-TiB2 addition on densification, hardness, microstructure, phase transformation, and corrosion were investigated. The results showed a uniform dispersion of TiB2 particles in the titanium matrix during the sintering process. The relative density of the sintered titanium-based composites decreased with an increase in TiB2 percentage. The addition of 5-20 wt.% Cr-TiB2 resulted in a microstructural transformation characterized by equiaxed alpha-precipitates embedded within the beta-phase matrix, and ceramic reinforcements increased the corrosion resistance of the alloys.
JOURNAL OF THE KOREAN CERAMIC SOCIETY
(2023)
Review
Materials Science, Ceramics
Smith Salifu, Peter Apata Olubambi
Summary: The quest to replace glass with transparent aluminium ceramics (AlON) in various applications has been ongoing for a long time. Despite the challenges, researchers are focusing on developing cost-effective fabrication methods that will revolutionize the engineering world. This review paper presents the fabrication techniques, challenges, and prospects associated with transparent AlON ceramics to stimulate research interest in this area.
JOURNAL OF THE KOREAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Olugbenga Ogunbiyi, Yebing Tian, Abayomi Adewale Akinwande, Azeez Lawan Rominiyi
Summary: In this study, AA7075/Fe1.2CrZnCuAlTi0.8 (HEA) composites were prepared using microwave sintering, and the results were analyzed using response surface methodology (RSM). The study found that the percentage of HEA (5 wt%, 10 wt%, 15 wt%), compaction pressure (20 MPa, 60 MPa, 100 MPa), and sintering temperature (300 degrees C, 450 degrees C, 600 degrees C) influenced the microstructural evolution of the composites. XRD analysis detected the presence of different phases as the sintering temperature increased. The optimal input combinations for achieving desired strength enhancement were determined to be 11.7% HEA, 75.2 MPa pressure, and 447.7 degrees C sintering temperature.
Article
Multidisciplinary Sciences
Azeez Lawan Rominiyi, Peter Madindwa Mashinini
Summary: This study investigated the nanomechanical and tribological properties of spark plasma sintered Ti-xNi (x = 2, 6, and 10 wt%) alloys using nanoindentation and dry sliding wear techniques. The microstructure and phase composition of the alloys were analyzed, revealing the presence of alpha-Ti and Ti2Ni intermetallic phases. The results showed that the hardness, elastic modulus, and elastic recovery index of the developed alloys increased with increasing nickel content. The Ti-xNi alloys exhibited better anti-wear characteristics compared to pure Ti.
Article
Engineering, Multidisciplinary
Matthew Adah Onu, Olusola Olaitan Ayeleru, Bilainu Oboirien, Peter Apata Olubambi
Summary: This study investigated the thermal catalytic conversion of waste PP and PE polymers into carbon nanotubes (CNTs). The results showed that the CNTs obtained from PP had a higher graphitic value and more ordered graphite structure compared to those obtained from PE. It was also found that the recycled PP and PE could be used as good alternative carbon sources for CNT production.
ADVANCES IN SCIENCE AND TECHNOLOGY-RESEARCH JOURNAL
(2023)
