Calorimetry Investigation of Phase Stability and Thermal Property in Ti-5 % Ta Alloy

Behera, Madhusmita; Raju, S.; Kumar, Arun; Saroja, S.

doi:10.1007/s12666-013-0250-1

Cited by 2 publications

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“…Figure summarizes the phase formation in Ti‐Ta coating according to binary phase diagram and data obtained in this study. In terms of the composition, the solubility limit reported for Ta in α ‐Ti solid solutions varied from 0 to 2 at% at room temperature (RT) to 6.2 at% at 600 °C (see Figure ). According to our data, α‐ Ti remains the predominant phase at Ta content as high as 7.9 at%, as it can be seen in Figure , which could be explained as a consequence of the non‐equilibrium growth conditions, which causes changes in the solubility limits of alloys; as has been demonstrated by Chang et al The metastable α″ phase is obtained in the bulk after quenching from the β phase once the solubility limit of Ta in α ‐Ti is exceeded; α ″ is usually found for Ta contents between 7 and 21 at% .…”

Section: Resultsmentioning

confidence: 99%

Compositional and Tribo‐Mechanical Characterization of Ti‐Ta Coatings Prepared by Confocal Dual Magnetron Co‐Sputtering

et al. 2017

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Titanium-Tantalum coatings are deposited by magnetron co-sputtering technique, using independently driven titanium and tantalum targets. The effect of the Ta content on the structure, mechanical, and wear properties of Ti films is investigated. It is found that the percentage of the added Ta varies linearly from 3.7 to 31.3 at% by increasing the power applied to the Ta target from 10 to 100 W. The XRD results show that the coatings are crystalline, and there is no evidence of the formation of intermetallic phases, instead formation of metastable phases of α 00 and β depending on Ta content are observed, though the samples are deposited at low temperature (150 C). It is shown that the elastic strain to failure (H/E r ; hardness to reduced elastic moduli ratio) can be increased by 40% through the formation of crystalline phases with a lower E, while the hardness remains constant. The tribological study shows that increasing the Ta content up to 14.9 at% causes a significant improvement in adhesion of the coating to a soft metallic substrate.

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Section: Resultsmentioning

confidence: 99%