Titanium and aluminum nitride synthesis via layer by layer LA-CVD

Shishkovsky, Igor; Morozov, Yu. G.; Yadroitsev, Igor; Smurov, I.

doi:10.1016/j.apsusc.2009.04.104

Cited by 9 publications

(3 citation statements)

References 13 publications

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“…To the best of the authors' knowledge, this is the first article on a Ti-AlN composite manufactured by the SLM method. Although there are reported TiN and AlN materials fabricated by SLM using Ti and Al powders consolidated under N 2 atmosphere [11], there are no reports concerning the fabrication of three-dimensional Ti-AlN composites. It is expected that aluminum nitride, which is in a much harder phase, may improve the functional properties of commercially pure titanium.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Microstructure and Properties of a Ti–AlN Composite Produced by Selective Laser Melting

et al. 2020

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Selective Laser Melting (SLM) is a manufacturing technique that is currently used for the production of functional parts that are difficult to form by the traditional methods such as casting or CNC (Computer Numerical Control) cutting from a wide range of metallic materials. In our study, a mixture of commercially pure titanium (Ti) and 15% at. aluminum nitride (AlN) was Selective Laser Melted to form three-dimensional objects. The obtained 4 mm edge cubes with an energy density that varied from 70 to 140 J/mm3 were examined in terms of their microstructure, chemical and phase composition, porosity, and Vickers microhardness. Scanning Electron Microscopy (SEM) observations of the etched samples showed inhomogeneities in the form of pores and unmelted and partly melted AlN particles in the fine-grained dendritic matrix, which is typical for titanium nitrides and titanium aluminum nitrides. The AlN particles remained unmelted in samples, but no porosity was observed in the interface area between them and the dendritic matrix. Additionally, samples fabricated with the presintering step had zones with different sizes of dendrites, suggesting a differing chemical composition of the matrix and the possibility of the formation of the phases forming an Ti–Al–N ternary system. The chemical composition in the microareas of the samples was determined using Energy Dispersive X-Ray Spectroscopy (EDS) and revealed differences in the homogeneity of the samples depending on the SLM process parameters and the additional presintering step. The phase composition, examined using X-ray Diffraction analysis (XRD), showed that samples were formed from Ti, TiN, and AlN phases. Porosity tests carried out using a computer microtomography revealed porosities in a range from 7% to 17.5%. The formed material was characterized by a relatively high hardness exceeding 700 HV0.2 over the entire cross-section, which depended on the manufacturing conditions.

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Section: Introductionmentioning

confidence: 99%

Analysis of Microstructure and Properties of a Ti–AlN Composite Produced by Selective Laser Melting

et al. 2020

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“…Further, the list of materials expanded, although not all materials obtained were of satisfactory quality. Shishkovsky et al managed to obtain specimens from ZrO2 and Al [12] and AlN-Al and TiN-Ti [13] powder compositions. However, residual porosity and cracks were impossible to exclude.…”

Section: A State Of the Art On The L-pbf Mmcsmentioning

confidence: 99%

Physical and technological aspects of formation of metal matrix composites by laser-powder bed fusion

Pivkin,

Gusarov,

Khmyrov

et al. 2024

Laser + Photonics for Advanced Manufacturing

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Due to high functional properties such as resistance to mechanical, thermal and other physical and chemical impacts, metal matrix composites (MMCs) are widely used in high-tech industries for instance aerospace, automotive, medical, chemical, etc. Modern additive technologies that produce 3D products from metal powders using lasers are unique in terms of the possibility of obtaining new materials and complex parts with the required functional properties in one manufacturing cycle. Laser Powder Bed Fusion (L-PBF) technology makes it possible to greatly facilitate and accelerate the production of such products directly from their CAD (computer-aided design) models. The fundamentals of L-PBF technology provide a significant advantage both in the development of new materials and the manufacture of products from them. However, direct formation (in situ) and application of MMCs in the L-PBF process is constrained by insufficient elaboration of the fundamentals of the formation of these materials during laser processing and incomplete knowledge of the influence of the properties and nature of the initial materials and technological parameters of L-PBF on the final properties of MMCs. The investigation of the processes of forming metal matrix composites by laser-powder bed fusion is driven by the need to ensure stable and confident properties of L-PBF MMCs materials and parts regardless of the equipment used. In this research, the fundamentals of the L-PBF process during in-situ manufacturing of MMCs from dissimilar powders having different melting points and granulomorphometric properties are considered. Preliminary numerical simulations of thermal fields for different parameters of the L-PBF process on the powder mixture have been carried out.

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“…Nevertheless, the results are not yet conclusive given that various uncontrolled reactions can occur between N and Ti during laser processing, and these reactions may deteriorate the properties. 32,33 …”

Section: B Laser Chemical Vapor Depositionmentioning

confidence: 99%

Cost-effective SU-8 micro-structures by DUV excimer laser lithography for label-free biosensing

Sanza

Heras

Casquel

et al. 2011

Applied Surface Science

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This paper reviews progress over the last five years in the field of laser surface modification of titanium alloys. The authors analyze the effect of new laser technologies and new materials as tools for improving surface properties-specifically, biocompatibility and resistance to wear, corrosion, and high temperatures. The authors discuss the effect of laser processing parameters on the microstructure and compare the results obtained by various researchers. Therefore, an overview of the difficulties involved in the laser processing of titanium is provided with a discussion of future prospects.

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Titanium and aluminum nitride synthesis via layer by layer LA-CVD

Cited by 9 publications

References 13 publications

Analysis of Microstructure and Properties of a Ti–AlN Composite Produced by Selective Laser Melting

Analysis of Microstructure and Properties of a Ti–AlN Composite Produced by Selective Laser Melting

Physical and technological aspects of formation of metal matrix composites by laser-powder bed fusion

Cost-effective SU-8 micro-structures by DUV excimer laser lithography for label-free biosensing

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