Comparison of Microstructure and Properties Obtained by Different Solidification Techniques

Bergmann, H. W.; Barton, G.; Mordike, B. L.; Fritsch, H. U.

doi:10.1557/proc-28-29

Cited by 2 publications

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“…It is obvious that the temperature at the surface and Ti/ Si interface are above the melting point of Ti and Si, indicating a melt consisting of Ti and Si atoms. As stated by Bergmann et al, 18 a rapidly solidifying melt attempts to reduce its free energy as quickly as possible, rather than attaining its lowest possible free energy. 4.…”

Section: Resultsmentioning

confidence: 99%

Mechanism of simultaneous formation of refractory-metal free C40 and C49TiSi2 induced by Q-switched Nd:Yttrium–aluminum–garnet laser irradiation

Tan

See²,

et al. 2005

Journal of Vacuum Science &Amp; Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena

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In this article, we demonstrate the usefulness of using a Q-switched Nd:Yttrium-aluminum-garnet laser to induce various phases of TiSi 2 in 350 Å of Ti layer deposited onto ͑100͒ Si substrates by varying the pulse width, , and energy fluence of the laser. Two sets of experiments were carried out. In the first set of experiments, and energy fluence of the laser are set at 0.18 s and approximately 1.5 J / cm 2 , respectively. The laser annealed Ti/ Si sample was then characterized using micro-Raman spectroscopy and it was found that C49 TiSi 2 is formed at two different temperatures. One is formed at a nonmelting temperature, 680°C, and the other formation temperature is at a high temperature of around 1975°C. A mechanism is proposed to explain the formation of C49 under these two different conditions. In addition, we also note that C40 is formed between these two temperatures. In the second set of experiments, increasing to 1.6 s and reducing the energy fluence to approximately 1.0 J / cm 2 resulted in the formation of pure refractory C40. This refractory metal free C40 phase is confirmed with glancing angle x-ray diffraction.

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Section: Resultsmentioning

confidence: 99%

Mechanism of simultaneous formation of refractory-metal free C40 and C49TiSi2 induced by Q-switched Nd:Yttrium–aluminum–garnet laser irradiation

Tan

See²,

et al. 2005

Journal of Vacuum Science &Amp; Technology B: Microelectronics and Nanometer Structures Processing, Measurement, and Phenomena

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Morphology and corrosion characteristics of laser surface remelted Al-Si alloy at cryogenic conditions

Serbiński

Olivé

Frayret

et al. 2002

Materials and Corrosion

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The properties and consequently functionality of equipment made of aluminium alloys are influenced by microstructural characteristics such as phase composition and grain size distribution in their surface layer. Nowadays, many surface engineering techniques have been applied to improve the surface properties of aluminium alloys, one of them being laser surface treatment. The effect of laser surface remelting at cryogenic conditions on the local chemical compositions, microstructure and corrosion characteristics of AlSi13Mg1CuNi aluminium alloy have been presented. The beneficial effect of laser treatment on the corrosion behaviour of the cast aluminium alloy in 0.01 M sulphuric acid solution was observed.

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Comparison of Microstructure and Properties Obtained by Different Solidification Techniques

Abstract: The processes responsible for solidification, e.g., nucleation and growth, are influenced to various extents by the currently employed quenching techniques. The microstructures produced by these techniques are discussed and compared.

Cited by 2 publications

References 1 publication

Mechanism of simultaneous formation of refractory-metal free C40 and C49TiSi2 induced by Q-switched Nd:Yttrium–aluminum–garnet laser irradiation

Mechanism of simultaneous formation of refractory-metal free C40 and C49TiSi2 induced by Q-switched Nd:Yttrium–aluminum–garnet laser irradiation

Morphology and corrosion characteristics of laser surface remelted Al-Si alloy at cryogenic conditions

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