Structural evolution in Ti–Si alloy synthesized by mechanical alloying

Gu, Yang; Goi, L. S.; Jarfors, Anders E. W.; Butler, David; Lim, Chu Sing

doi:10.1016/j.physb.2004.08.001

Cited by 21 publications

(13 citation statements)

References 21 publications

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“…It can be seen that the Si concentration exceeded its maximum equilibrium solid solubility limit in the α-Ti phase (0.3 wt % Si at 865 • C [13]), indicating the formation of a supersaturated SS during the milling process. A similar observation was reported by Gu et al [28] who studied the MA of the Ti 8.39 wt %-Si system. They concluded that after 60 h of milling, a complete dissolution of Si in Ti is achieved.…”

Section: Mechanical Alloyingsupporting

confidence: 86%

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Synthesis and Electrochemical Properties of Ti-Si Alloys Prepared by Mechanical Alloying and Heat Treatment

Guzmán

García

Soliz

et al. 2018

Metals

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Abstract:The aim of this work was to study the synthesis and electrochemical properties of Ti 2 wt %-Si alloys prepared by mechanical alloying (MA) and heat treatment. The MA process was performed under Ar atmosphere. The structural, morphological, and compositional evolutions during the milling and subsequent heat treatment were investigated by X-ray diffraction, energy-dispersive spectroscopy, and scanning electron microscopy. The electrochemical behavior was evaluated by open circuit potential and linear sweep voltammetry measurements. The results showed that the MA process promotes the formation of a supersaturated α-Ti-Si solid solution. During heat treatment, the Si remaining in the mechanically alloyed powders and the Si from the α-Ti-Si supersaturated solid solution reacted with Ti to form Ti-Si intermetallic compounds. These compounds have a fine and homogeneous distribution in the α-Ti matrix, which cannot be achieved by conventional casting methods. Additionally, the electrochemical evaluations revealed that the mechanically alloyed and heat-treated Ti 2 wt %-Si powders have better corrosion resistance in 1.63 M H 2 SO 4 than the pure Ti and MA Ti-Si samples. This is likely due to the particular microstructure produced during the milling and subsequent heat treatment.

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Section: Mechanical Alloyingsupporting

confidence: 86%

“…Yang et al [27] Si 25 , where no obvious amorphization was observed. Also, Gu et al [28] investigated the MA process of Ti 8.39 wt % Si (eutectic composition) powders and reported the formation of a supersaturated SS of Si in Ti with traces of an amorphous phase.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Electrochemical Properties of Ti-Si Alloys Prepared by Mechanical Alloying and Heat Treatment

Guzmán

García

Soliz

et al. 2018

Metals

View full text Add to dashboard Cite

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“…As milling time increases, the material becomes less crystalline and the peaks become wider. These characteristics significantly affect the magnetic properties of the material 15 .…”

Section: Resultsmentioning

confidence: 99%

Influence of Milling Time During the Mechanical Alloying Process on the Properties of Fe-3Si-0.75P Alloy

et al. 2015

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In this study the soft magnetic alloy Fe-3Si-0.75P (wt%) was obtained by mechanical alloying through powder metallurgy. The processing included the formulation of metallic powder, wet milling for 1 h, 3 h, 6h and 9 h, in an attritor mill using alcohol P.A. as a lubricant. Cold compaction was then performed in a floating die under 600 MPa pressure and, finally the ring-shaped test specimens were sintered at 1150 °C for 1h. The electrical, physical and magnetic properties were then analyzed using the following assays: Laser granulometry, density, metallography, hysteresis curve and AC permeability, resistivity and XRD. The results showed a strong influence of milling time on magnetic properties of the alloy. There was a decrease in grain size with the milling time, which is likely the cause of increased in magnetic properties.

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“…Really, this coating presents high mechanical resistance and excellent adherence on the silica surface, propitiating significant durability to the film. Moreover, it is well-established that SiO 2 and TiO 2 are biocompatible compounds used in various biomaterials, such as prosthesis, illustrating the excellent perspectives regarding this new catheter [18].…”

Section: Discussionmentioning

confidence: 99%

Catheter with dielectric optical filter deposited upon the fiber optic end for Ramanin vivobiospectroscopy applications

et al. 2008

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Abstract. Raman spectroscopy (RS) is a powerful tool that allows obtaining significant biochemical information from biological tissue. The fiber optic catheter permits applications in vivo that present wide clinical employment. This biochemical analysis is developed through a guide light that furnishes to Raman spectroscopy system the data obtained from tissue. These Raman signals represent the modes of vibration of molecular groups that are present in the biological molecules. Raman measurements undergo the optical influence of the material that constitutes the catheter, mainly Raman scattering of the silica that composes the fiber optic, decreasing signal to noise ratio (SNR) of the resultant spectra. In this work, a dielectric optical filter called "bandpass" was deposited upon the surface of the tip of the central fiber optic (distal probe). Indeed, other six fibers without any optical filter are disposed around this central optical fiber with "bandpass". This prototype of catheter presented significant decrease of the silica Raman scattering when compared with unfiltered catheters. The biomedical applications of this new catheter are auspicious, involving biochemical analysis and diagnosis in vivo, since the SNR improvement obtained propitiates a much more informative Raman spectrum.

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Structural evolution in Ti–Si alloy synthesized by mechanical alloying

Cited by 21 publications

References 21 publications

Synthesis and Electrochemical Properties of Ti-Si Alloys Prepared by Mechanical Alloying and Heat Treatment

Synthesis and Electrochemical Properties of Ti-Si Alloys Prepared by Mechanical Alloying and Heat Treatment

Influence of Milling Time During the Mechanical Alloying Process on the Properties of Fe-3Si-0.75P Alloy

Catheter with dielectric optical filter deposited upon the fiber optic end for Ramanin vivobiospectroscopy applications

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