Sintering behavior of titanium–titanium nitride nanocomposite powders

Dabhade, Vikram V.; Mohan, T.R. Rama; Ramakrishnan, P.

doi:10.1016/j.jallcom.2006.11.187

Cited by 29 publications

(13 citation statements)

References 23 publications

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“…7). The dominating particle morphology is spherical although somewhere cuboids were found, which is typical of ultrafine δ-TiN x particles [25,26] as well as of δ-TiN x clusters [27]. The electron diffraction patterns consist of diffuse rings and distinct spots (inset of Fig.…”

Section: Tem Investigation: Morphology and Chemical Composition Omentioning

confidence: 95%

Structure and composition of titanium spark erosion powder obtained in liquid nitrogen

Monastyrsky¹,

Ochin²,

WANG³

et al. 2011

Chem. Met. Alloys

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Titanium powders were obtained by the spark-erosion method in liquid nitrogen. As-processed powder particles with typical sizes between 1 and 50 microns have spherical shape. The surface of the Ti powder particles has irregular structure. Many of the micron-sized particles contain irregular holes inside. The inner surface of the holes has well arranged bubble-like structure. The chemical analysis, made by the Kjeldahl method, showed that the powder contains 11.24±0.06 wt.% of nitrogen, while the more reliable XRD method gave 12.4±0.2 wt.%. Backscattering scanning electron microscopy images of cross sections of powder particles, as well as EDX analyses, showed a cellular structure of the particles with nitrogen-rich areas of several microns, separated by relatively thin boundaries of α-Ti(N). The XRD study confirmed that the powder contains about 85 wt.% of the δ-TiN x nitride (osbornite, Fm-3m), 10 wt.% of α-Ti(N) (P6 3 /mmc) and minor quantities of α-and β β β β-Ti (no more than 4 % in total). The TEM investigation showed that particles with sizes between 10 and 100 nm are mainly δ-TiN x nitride, although the quantity of oxygen in the nanoparticles is high. The proposed model for solidification of Ti powder particles considers multiple formation of nuclei of the solid phase on the surface of liquid droplets. It makes it possible to estimate, on the one hand the upper and lower temperatures of the molten droplets that were reached during the spark erosion, and on the other hand the cooling rate, and eventually to specify the mechanism of pore formation inside the powder particles.

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Section: Tem Investigation: Morphology and Chemical Composition Omentioning

confidence: 95%

Structure and composition of titanium spark erosion powder obtained in liquid nitrogen

Monastyrsky¹,

Ochin²,

WANG³

et al. 2011

Chem. Met. Alloys

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“…The main stumbling block in solid state sintering is the ceramic reinforcement phase reduces the compressibility of aluminum alloy powders [54] and affects the sintering stress NiFe-CNT and Ni3Fe-CNT 60 1040 [45] at Al-Al contacts, causes poor bonding between matrix and reinforcement phase [55,56]. Super solidus Liquid Sintering (SLPS) differs from liquid phase sintering is, in which, pre-alloyed powders are heated between the solidus and liquidus temperatures of the alloy [57].…”

Section: Sintering Temperaturementioning

confidence: 99%

The effect of process parameters in Aluminum Metal Matrix Composites with Powder Metallurgy

Vani

Chak

2018

Manufacturing Rev.

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Metal Matrix Composites are developed in recent years as an alternative over conventional engineering materials due to their improved properties. Among all, Aluminium Matrix Composites (AMCs) are increasing their demand due to low density, high strength-to-weight ratio, high toughness, corrosion resistance, higher stiffness, improved wear resistance, increased creep resistance, low co-efficient of thermal expansion, improved high temperature properties. Major applications of these materials have been in aerospace, automobile, military. There are different processing techniques for the fabrication of AMCs. Powder metallurgy is a one of the most promising and versatile routes for fabrication of particle reinforced AMCs as compared to other manufacturing methods. This method ensures the good wettability between matrix and reinforcement, homogeneous microstructure of the fabricated MMC, and prevents the formation of any undesirable phases. This article addresses mainly on the effect of process parameters like sintering time, temperature and particle size on the microstructure of aluminum metal matrix composites.

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“…Nanoscale materials have been the subject of major interest in recent years due to the anticipated ultrahigh strength and toughness combination that can be achieved in contrast to materials with conventional meso and microscale structures [1][2][3]. Reinforcement with nanoscale ceramic powders or the use of nanostructured powders of both the matrix and reinforcement producing nanocomposites derived the attention of the researchers to produce ultrahigh strength/tough MMCs.…”

Section: Journal Of Nanomaterialsmentioning

confidence: 99%

“…MMC can be tailored in different methods depending on the type and shape of the reinforcing phase (dispersion, particulate, whiskers, or fiber) and the consolidation technique produced to produce the bulk product [1]. The sintering behavior of metal matrix nanocomposites has been investigated for different matrices such as Ti [2], Cu [3], and Al-matrices [1,[4][5][6][7][8][9] with various ceramic reinforcements. Ti and Al-powders suffer from the formation of an oxide stable and brittle film, which strongly influences the consolidation behavior of the produced consolidates and hence their mechanical and physical properties [2].…”

Section: Introductionmentioning

confidence: 99%

Bulk Behavior of Ball Milled AA2124 Nanostructured Powders Reinforced with TiC

Salem

El-Eskandarany

Kandil

et al. 2009

Journal of Nanomaterials

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In the current research work, a top-down approach was employed for the refinement of a micron scale AA2124 alloy powder 40 μm in average size using high-energy ball milling up to 60 hours. The produced nanopowders were investigated compared to the micron gas atomized powder both in the monolithic and the reinforced composite states. 1 μm powder of TiC with internal structure <100 nm was used for the reinforcement of the 2124-Al matrices. Milling time of 36 hours produced a <100 nm nanopowders with internal structure size <20 nm. The nanopowder monolithic consolidates exhibited compressive strength of 388 MPa compared to 313 MPa for micronpowder one. Addition of TiC nanostructured powder to the nanopowder consolidated matrix resulted in increase of 130% in compressive strength compared to that produced for the microscale one. Nanopowder of Alalloys produced by mechanical milling reinforced with 10 wt% TiC is recommended for products suitable for high wear and erosion resistance applications. Peak aging increased the hardness and compressive strength of the as compacted micronpowder matrices by an average of 188% and 123%, while increased that of the nanopowder matrices by an average of 110% and 117%, respectively.

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Sintering behavior of titanium–titanium nitride nanocomposite powders

Cited by 29 publications

References 23 publications

Structure and composition of titanium spark erosion powder obtained in liquid nitrogen

Structure and composition of titanium spark erosion powder obtained in liquid nitrogen

The effect of process parameters in Aluminum Metal Matrix Composites with Powder Metallurgy

Bulk Behavior of Ball Milled AA2124 Nanostructured Powders Reinforced with TiC

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