Advances in processing of NiAl intermetallic alloys and composites for high temperature aerospace applications

Bochenek, Kamil; Basista, Michał

doi:10.1016/j.paerosci.2015.09.003

Cited by 182 publications

(44 citation statements)

References 91 publications

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“…This core shell structure also illustrated that, because the Gibbs free energy of NiAl 3 intermetallic compounds is lower than that of other Ni-Al intermetallic compounds [44], the NiAl 3 phase formed first through the fast diffusion of Al atoms into Ni particles; then, NiAl 3 and Ni reacted with each other to form a Ni 2 Al 3 phase. The diffusion mechanism of Ni-Al intermetallic compounds has been widely reported [5,13,29,40,42,43]. By comparing the cross-sectional morphologies of the Ni/Al-TiB 2 composite coatings (as-sprayed at gas temperatures of 250 and 450 • C) annealed at 650 • C for 10 h, the contents of NiAl 3 and Ni 2 Al 3 intermetallic compounds, measured using image analysis of five backscattered SEM images, were clearly different in each annealed coating because of the effect of the cold spraying gas temperature.…”

Section: Xrd Patterns Of the Annealed Ni/al-tib2 Coatingsmentioning

confidence: 99%

“…NiAl intermetallic compounds are regarded as high-temperature structure materials, owing to their outstanding properties, such as high creep strength, high melting point (1676 • C), high oxidation and corrosion resistance, low density (5.9 g/cm 3 ), and high thermal conductivity (76 W/mK) [1][2][3][4][5]. However, the inherent shortcomings of NiAl intermetallic compounds, such as poor fracture toughness at room temperature, low ductility at ambient temperatures, and inadequate strength at elevated temperatures, limit their high temperature structural applications [6].…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and Microhardness of Ni/Al-TiB2 Composite Coatings Prepared by Cold Spraying Combined with Postannealing Treatment

Chen

et al. 2019

Coatings

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Ni/Al-TiB2 composite powders were deposited on the surface of 316L stainless-steel substrates by cold spraying at gas temperatures of 250 and 450 °C, respectively. Then, the as-sprayed coatings were annealed at 650 °C for 10, 20, and 30 h. The experimental results showed that the average porosity of as-sprayed coating dropped from about 0.68% to 0.054% as the cold spraying gas temperature increased. The contents of Ni, Al, and TiB2 in the as-sprayed coatings were different from that of the Ni/Al-TiB2 composite powders. The main phase compositions of the as-sprayed Ni/Al-TiB2 coatings were the same as those of composite powder, consisting only of pure Ni, Al, and TiB2 phases. TiB2 as a reinforced particle in the as-sprayed coating could obviously increase the microhardness of the coatings. NiAl3 and Ni2Al3 intermetallic compounds were synthesized in situ in all of the annealed coatings, and the average contents of NiAl3 and Ni2Al3 intermetallic compounds increased as the cold spraying gas temperature increased. The distribution of TiB2 particle was changed as the annealing times increased, which changed from more comparative uniform distribution to accumulation. The average porosity of the annealed coatings increased as the annealing time increased. The microhardness of Ni/Al-TiB2 coatings annealed at 650 °C for 10 h was increased remarkably due to the reinforcement role of TiB2 particles and NiAl3 and Ni2Al3 intermetallic compounds.

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Section: Xrd Patterns Of the Annealed Ni/al-tib2 Coatingsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructure and Microhardness of Ni/Al-TiB2 Composite Coatings Prepared by Cold Spraying Combined with Postannealing Treatment

Chen

et al. 2019

Coatings

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“…The most important are the following properties: a relatively high melting point and Young's modulus, high resistance to oxidation and low density (favourable specific strength R m /ρ), relatively low friction wear and sufficiently high resistance to the effect of chemicals [1][2][3]. A combination of these features decides that the above mentioned phases are used as a base material for multicomponent alloys, mainly those designed for operation at high temperatures [4]. In numerous alloys, the Ni 3 Al phase is also used as a reinforcing element [5,6].…”

Section: Introductionmentioning

confidence: 99%

Characteristics of the Nial/Ni3al Matrix Composite With Tib2 Particles Fabricated By High Pressure – High Temperature Sintering

Hyjek

Sulima

Jaworska

2017

Archives of Metallurgy and Materials

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The article presents the results of tests carried out on the manufactured composite materials based on a two-phase NiAl/Ni 3 Al matrix, which was enriched with the addition of TiB 2 ceramic particles added in an amount of 4 and 7 vol%. The resulting mixtures were sintered by the High Pressure High Temperature (HP-HT) process. The results were compared to the results obtained for the sole matrix material produced under the same conditions. It has been shown that, at a lower density, the addition of reinforcing particles increases the composite hardness, Young's modulus and resistance to frictional wear. However, higher addition of TiB 2 (7 vol%) was observed to yield less satisfactory results, and despite higher hardness and lower density caused a decrease in other properties tested. The produced materials were characterized by a compact and highly differentiated microstructure free from any noticeable cracks and pores.

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“…[13,14] Elastoplastic material model was assumed for the NiAl phase, while linear elastic for the ceramic phase. The input file developed for ABAQUS with the ScanIP/ScanFE software was modified for application in the academic FEM program FEAP ver.…”

Section: Case Study I: Micro-ct Fem Model For Thermal Residual Stressmentioning

confidence: 99%

Micro‐CT Finite Element Analysis of Thermal Residual Stresses and Fracture in Metal‐Ceramic Composites

et al. 2016

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This paper presents a simple way of using X-ray micro-computed tomography (micro-CT) in numerical modeling of material properties of metal-ceramic composites. It shows step by step the proposed methodology with details of the finite element mesh creation, so that it can easily be reproduced by interested researchers. Two case studies are considered to show the proposed approach at work: i) determination of processing-induced residual stresses in hot pressed Cr/Al 2 O 3 and NiAl/ Al 2 O 3 particulate composites and ii) determination of J-integral for an interpenetrating phase composite made of porous alumina preform infiltrated with molten copper. The method is straightforward and effective but has its limitations that are pointed out.

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Advances in processing of NiAl intermetallic alloys and composites for high temperature aerospace applications

Cited by 182 publications

References 91 publications

Microstructure and Microhardness of Ni/Al-TiB2 Composite Coatings Prepared by Cold Spraying Combined with Postannealing Treatment

Microstructure and Microhardness of Ni/Al-TiB2 Composite Coatings Prepared by Cold Spraying Combined with Postannealing Treatment

Characteristics of the Nial/Ni3al Matrix Composite With Tib2 Particles Fabricated By High Pressure – High Temperature Sintering

Micro‐CT Finite Element Analysis of Thermal Residual Stresses and Fracture in Metal‐Ceramic Composites

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