Titanium Carbide Nanofibers-Reinforced Aluminum Compacts, a New Strategy to Enhance Mechanical Properties

Khalil, Khalil Abdelrazek; Sherif, El‐Sayed M.; Nabawy, Ahmed; Abdo, Hany S.; Marzouk, W.W.; Alharbi, Hamad F.

doi:10.3390/ma9050399

Cited by 24 publications

(23 citation statements)

References 31 publications

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“…The use of Ti-base alloys in various fields comes from its super biocompatibility, excellent mechanical properties, and great corrosion resistance in many aggressive environments [10][11][12][13][14]. The use of titanium alloys in offshore structures and marine applications results from it low density, superior strength, and extremely high resistance to corrosion [2,3,[15][16][17][18][19][20]. Another important usage of titanium alloys is as an outstanding and strong material in the field of biomedical implantations [8][9][10][11][12][13][14][15]21].…”

Section: Introductionmentioning

confidence: 99%

Beneficial Effects of Vanadium Additions on the Corrosion of Ti6AlxV Alloys in Chloride Solutions

Sherif

Abdo

Alharthi

2020

Metals

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The beneficial effects of V addition on the corrosion of a newly manufactured Ti6AlxV (x = 2 wt %, 4 wt %, 6 wt %, and 8 wt %) alloys after various exposure periods in 3.5% NaCl solutions were reported. The Ti6AlxV were produced from their raw powders using mechanical alloying. Several electrochemical techniques such as electrochemical impedance spectroscopy, cyclic potentiodynamic polarization, and potentiodynamic current versus time at 300 mV experiments were conducted. The surface morphology and the elemental analysis were performed using scanning electron microscopy and energy dispersive X-ray analyses. All results were consistent with each other revealing that the increase of V content increases the resistance of the alloys against corrosion. The increase of corrosion resistance was achieved by the role of V in decreasing the rate of corrosion as a result of the formation of oxide films on the surface of the alloys. This effect was found to increase with prolonging the immersion time of the Ti6AlxV alloys in the test medium from 1 h to 24 h and further to 48 h. particularly in implantation systems [24][25][26]. Other titanium alloys like Ti6Al7Nb and Ti13Cu4.5Ni, in addition to the Ti6Al4V alloy, have been selected as the only choice for the use in orthopedic implants [27]. It has also been reported [28][29][30][31][32][33][34] that resistance versus corrosion in-vitro to form a stable oxide film in harsh media is the main reason for these alloys to be popular and applicable in the field of biomedical applications.In this work, we aimed to produce a series of Ti-base alloys, namely Ti6Al2V, Ti6Al4V, Ti6Al6V, and Ti6Al8V alloys, from its pure powders, and reported their corrosion after immersion in 3.5% NaCl solution for different periods of time, namely 1 h, 24 h, and 48 h. The effect of increasing V content within the fabricated alloys on their corrosion in the test solution was reported using various electrochemical techniques like polarization, electrochemical impedance spectroscopy, and potentiostatic current-time at 300 mV (Ag/AgCl). Other surface analysis methods, including scanning electron microscopy (SEM) images and energy dispersive X-ray (EDX) spectra, were performed to ensure the compositions, the surface morphology, and expected corrosion products that might be formed after corrosion due to the reaction between the surfaces of the alloys and the chloride test solution.

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Section: Introductionmentioning

confidence: 99%

Beneficial Effects of Vanadium Additions on the Corrosion of Ti6AlxV Alloys in Chloride Solutions

Sherif

Abdo

Alharthi

2020

Metals

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“…Ti-base alloys have exceptional properties such as excellent mechanical properties, great biocompatibility, and outstanding corrosion resistance against various aggressive electrolytes [1][2][3][4][5]. For that, these alloys have been employed as a standard engineering materials in numerous industrial applications such as their potential use in medical, military, marine, and offshore application [4][5][6][7][8]. The fact that the good corrosion resistance to most corrosive media, the low density, and the high strength make various titanium alloys applicable to be employed in the marine industries and offshore structures [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…For that, these alloys have been employed as a standard engineering materials in numerous industrial applications such as their potential use in medical, military, marine, and offshore application [4][5][6][7][8]. The fact that the good corrosion resistance to most corrosive media, the low density, and the high strength make various titanium alloys applicable to be employed in the marine industries and offshore structures [4][5][6][7][8]. The excellent corrosion resistance accounted for the Ti-base alloys has been claimed due to the surfaces of these materials having the ability to develop and form a continuous, highly adherent, stable, and protective titanium oxide layer (TiO 2 ).…”

Section: Introductionmentioning

confidence: 99%

Manufacturing of Ti-6%Al and Ti-6%Al-4%V Alloys and Their Corrosion in Sodium Chloride Solutions

2020

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The current research aims at the manufacturing of Ti-6%Al alloy and Ti-6%Al-4%V alloy using the mechanical alloying method and studying their corrosion behavior after various periods of immersions in 3.5% NaCl solutions. The fabricated alloys were also evaluated using spectroscopic techniques such as X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray spectroscopy analyses. The corrosion behavior was studied using potentiodynamic polarization, electrochemical impedance spectroscopy, and chronoamperometric current-time electrochemical methods. It is confirmed that the presence of 4% V greatly decreases the uniform corrosion of the Ti-6%Al alloy as a result of the role of V in decreasing the cathodic, anodic, and corrosion current, and the rate of corrosion along with increasing the corrosion resistance. Increasing the time of immersion to 24 h and further to 48 h highly decreased the corrosion of the alloys. The presence of 4% V and extending the time of exposure thus increase the resistance against corrosion via decreasing the corrosion of Ti-6%Al alloy in the chloride test solution. ; writing-original draft preparation, E.-S.M.S. and H.S.A.; writing-review and editing, E.-S.M.S.; supervision, E.-S.M.S.; project administration, E.-S.M.S.; funding acquisition, E.-S.M.S. All authors have read and agreed to the published version of the manuscript.

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“…It can be seen that the ACNFs possessed rougher, irregular, and undulated structure compared to NFs prior activation. The average diameter of the all NFs also decreased up to 40% from 450 nm to 270 nm due to the removal of PAN and other molecules during the heat treatment resulting in weight loss and NFs' diameter reduction [8,9]. As shown in Figure 2 Although this result counterback the result of previous research conducted by Dadvar et al [6], as they said the increasing the amount of metal oxide loaded, the smaller the diameter of the NFs; this study has concluded that NFs were only affected by the amount of metal oxide, which is up to its maximum loading depends on the type of the metal oxide used in order to produce NFs with better structure.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Different Loading of Zinc Oxide on Activated Carbon Nanofibers

Othman

Yusof²,

Raffi

et al. 2017

MJAS

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The study deals on the modified PAN-based activated carbon nanofibers (ACNFs) embedded with different amount of zinc oxides (ZnO) (0, 5, 10, and 15% relative to PAN wt.) to be used as adsorbents for natural gas adsorption. The nanofibers (NFs) were successfully fabricated via electrospinning process at optimize parameters. The resultant NFs underwent three steps of pyrolysis process which are stabilization, carbonization and activation at optimum parameters. The morphological structure and diameter of pure and modified ACNFs were characterized using SEM while the existences of chemical bonds were analyzed by FTIR analysis. XRD analysis was done to identify the crystallinity of the ACNFs. BET method was used to identify the specific surface area (SSA) and nitrogen adsorption isotherm of the samples. The results showed that the SSA of ACNF5 (163.04 m 2 /g) is significantly higher compared to the pristine and other modified ACNFs, nevertheless the obtained results is much lower compared to average theoretical value. SEM micrograph depicted that all ACNF samples possessed average diameter of 300 -500 nm with smooth and aligned structure. The presence of white spots as ZnO alongside the NFs has been confirmed with FTIR and XRD analysis. From these findings, it is believed that ACNFs/ZnO will become a new adsorbent with great potential for gas adsorption and storage in the near future applications.Keywords: activated carbon nanofibers, zinc oxide, polyacrylonitrile, specific surface area Abstrak Kajian ini membincangkan tentang gentian-nano karbon teraktif (ACNFs) terubah suai berasaskan polimer PAN yang digabungkan dengan kandungan zink oksida (ZnO) yang berbeza (0, 5, 10, dan 15% berdasarkan berat PAN) untuk digunakan sebagai penjerap dalam penjerapan gas asli. Gentian-nano (NFs) telah berjaya direka melalui proses putaran elektro menggunakan parameter-paramter optimum daripada kajian terdahulu. Kemudian, NFs yang terbentuk akan melalui tiga peringkat proses pirolisis iaitu penstabilan, karbonisasi, dan pengaktifan menggunakan parameter optimum daripada kajian terdahulu. Struktur morfologi dan diameter ACNFs tulen dan yang telah diubahsuai dengan ZnO telah dicirikan menggunakan SEM manakala kewujudan ikatan kimia telah dianalisis menggunakan FTIR. Selain itu, untuk mengenalpasti penghabluran ACNFs yang terhasil, analisis yang dikenali sebagai XRD telah dijalankan. Kaedah BET pula dijalankan untuk mengenal pasti luas permukaan tertentu (SSA) dan isoterma penjerapan nitrogen. Hasil kajian menunjukkan bahawa SSA sampel ACNF5 (163,04 m 2 /g) adalah lebih tinggi berbanding dengan ACNFs tulen atau ACNFs yang telah diubahsuai yang lain..Walau bagaimanapun, keputusan yang diperoleh menunjukkan SSA yang jauh lebih rendah berbanding dengan nilai teori purata. Melalui SEM mikrograf, semua sampel ACNFs yang dihasilkan melalui kajian ini memiliki diameter purata dari 300 hingga 500 nm dengan struktur licin dan sejajar. Kehadiran bintik putih sebagai ZnO telah disahkan melalui analisis FTIR dan XRD.

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Titanium Carbide Nanofibers-Reinforced Aluminum Compacts, a New Strategy to Enhance Mechanical Properties

Cited by 24 publications

References 31 publications

Beneficial Effects of Vanadium Additions on the Corrosion of Ti6AlxV Alloys in Chloride Solutions

Beneficial Effects of Vanadium Additions on the Corrosion of Ti6AlxV Alloys in Chloride Solutions

Manufacturing of Ti-6%Al and Ti-6%Al-4%V Alloys and Their Corrosion in Sodium Chloride Solutions

Preparation and Characterization of Different Loading of Zinc Oxide on Activated Carbon Nanofibers

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