Experimental Study of Laser Treatment of Ti3AlC2 Max Phase

Krinitcyn, M. G.; Kashnikova, Olga; Ragulina, M. P.; Baranovskiy, A. V.; Firsina, I. A.; Nikolaev, I. A.

doi:10.1109/efre47760.2020.9242126

Cited by 1 publication

(1 citation statement)

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“…Complicating the process is the interaction of initial powders with the laser. Indeed, the decomposition that show up when an individual component of the MAX phase is adopted as an initial powder, into intermediates phases in the melting process, 19,33,34 or the insufficient solid–liquid reaction time 35 between the phases involved, when the stoichiometric powder mixture of the desired MAX phase is adopted in the SLM process are among the main features influencing the manufacturing process of MAX phases by SLM. Despite what has been mentioned earlier, the powder that is deemed suitable to yield acceptable quality parts in the manufacturing of MAX phases in PBF process is the stoichiometric powder mixture, as it can be combined with some reactive sintering process such as but not limited to pressureless sintering, 36,37 to achieve a pure component of MAX phase.…”

Section: Introductionmentioning

confidence: 99%

Use of additives for porosity control in the manufacturing of MAX phase components by powder bed fusion processes

Bakoutas

Yan

et al. 2023

J Am Ceram Soc.

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Porosity is a major concern in the manufacturing of MAX phase components through powder bed fusion process. Three factors, powder characteristics, processing parameters, and internal reactions have been identified as key factors governing densifications of these printed parts. While investigations on the first two factors are quite common, the last one seems less explored. In this study, micro-alloying (substitution) on the M-site was selected as a possible way of tuning the internal reaction. A lower diffusion material niobium was adopted as a substitutional component through the relation (2 − 𝑥)Ti ∶ (1 + 𝑥)Al ∶ C ∶ 𝑦Nb,that combine three pre-existing concepts on powder mixture, including stoichiometric, near-stoichiometric, and the solid solution on M-site. Two powder mixtures in prescribed ratio related to two different combinations of x and y values arbitrarily chosen denoted by Nb1 and Nb3 were considered for investigation. A comparison of density and area fraction quantifying the distribution of pores and compact areas on the upper surface of the sample was made. A skeletal density of 94.85% and a compact area fraction of 68.24% were outstanding characteristics displayed in the Nb1 and Nb3 series, respectively, with a significant dependence on the processing parameters. The advantages and disadvantages of these two powder mixtures are discussed.

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Section: Introductionmentioning

confidence: 99%