Microstructure and mechanical properties of Ni3Al base alloy reinforced with Cr particles produced by powder metallurgy

Barriocanal, J. García; Pérez, P.; Garcés, G.; Adeva, P.

doi:10.1016/j.intermet.2005.08.008

Cited by 24 publications

(14 citation statements)

References 24 publications

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“…This powder metallurgy technique can be used to produce dense titanium samples without additional materials, or scaffolds of porous titanium with controlled porosity, pore size and morphology, which is ensured through the selection of appropriate spacers 1,14,18,27 . Furthermore, the main advantage of this technique it allows for the preparation of implants with interconnected pores resembling a three-dimensional network 17,18,24 , a feature that was observed in this study. Another important aspect to control during the preparation of a Ti powder metallurgy product is its oxygen content 35 ; hence, all the titanium samples were manufactured under vacuum (10 -7 torr).…”

Section: Discussionmentioning

confidence: 67%

“…These porous structures have many applications ranging from spinal fixation to acetabular hip prostheses 5,13 , dental implants, permanent osteosynthesis plates 13 , and intervertebral discs 5 . However, there are few techniques for manufacturing these complex shapes with interconnected pores without the need for machining steps 1,[14][15][16][17] . Several methods have therefore been investigated, including the powder metallurgy technique, which seems to be particularly advantageous because of its processing route and cost 1,14,[16][17][18] .…”

Section: Introductionmentioning

confidence: 99%

“…However, there are few techniques for manufacturing these complex shapes with interconnected pores without the need for machining steps 1,[14][15][16][17] . Several methods have therefore been investigated, including the powder metallurgy technique, which seems to be particularly advantageous because of its processing route and cost 1,14,[16][17][18] . In powder metallurgy, pores can originate from the particle compacting arrangement or from changes in this arrangement, when decomposition of spacer particles causes increasing porosity, and from solid-state diffusion in the sintering step 19 .…”

Section: Introductionmentioning

confidence: 99%

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Porous titanium scaffolds produced by powder metallurgy for biomedical applications

et al. 2008

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Porous titanium scaffolds are promising materials for biomedical applications such as prosthetic anchors, fillers and bone reconstruction. This study evaluated the bone/titanium interface of scaffolds with interconnected pores prepared by powder metallurgy, using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). Porous scaffolds and dense samples were implanted in the tibia of rabbits, which were subsequently killed 1, 4, and 8 weeks after surgery. Initial bone neoformation was observed one week after implantation. Bone ingrowth in pores and the Ca/P ratio at the interface were remarkably enhanced at 4 and 8 weeks. The results showed that the interconnected pores of the titanium scaffolds promoted bone ingrowth, which increased over time. The powder metallurgy technique thus proved effective in producing porous scaffolds and dense titanium for biomedical applications, allowing for adequate control of pore size and porosity and promoting bone ingrowth.

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Section: Discussionmentioning

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Porous titanium scaffolds produced by powder metallurgy for biomedical applications

et al. 2008

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“…Current fabrication methods include the use of TiH 2 suspension for reactive sintering 12 or organic additives for powder metallurgy (PM), 4,9,13,14,15 multiple coating, 16 the tape casting 17 and environmental electro-discharge sintering process. 18 Based on the potential for a porous surface to enhance implant-bone contact, the purpose of this study was to evaluate the influence of pore size and porosity on bone neoformation in the use of titanium implants produced by PM technique.…”

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confidence: 99%

Evaluation of bone ingrowth into porous titanium implant: histomorphometric analysis in rabbits

et al. 2010

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A porous material for bone ingrowth with adequate pore structure and appropriate mechanical properties has long been sought as the ideal bone-implant interface. This study aimed to assess in vivo the influence of three types of porous titanium implant on the new bone ingrowth. The implants were produced by means of a powder metallurgy technique with different porosities and pore sizes: Group 1 = 30% and 180 µm; Group 2 = 30% and 300 µm; and Group 3 = 40% and 180 µm. Six rabbits received one implant of each type in the right and left tibiae and were sacrificed 8 weeks after surgery for histological and histomorphometric analyses. Histological analysis confirmed new bone in contact with the implant, formed in direction of pores. Histomorphometric evaluation demonstrated that the new bone formation was statistically significantly lower in the group G1 than in group G3, (P = 0.023). Based on these results, increased porosity and pore size were concluded to have a positive effect on the amount of bone ingrowth.

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“…Mechanical alloying is one of the solid state methods, which is suitable for producing compounds with high steam pressure and elements with different melting points that are not produced using the conventional methods [15,16]. Also, this method can be used to directly produce nanocrystalline structures [17].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Nanocrystalline Ni₅₀Al_50−xMo_x (x = 0–5) Intermetallic Compound during Mechanical Alloying Process

Khajesarvi

Akbari

2015

Journal of Nanoparticles

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Nanocrystalline Ni 50 Al 50− Mo ( = 0, 0.5, 1, 2.5, 5) intermetallic compound was produced through mechanical alloying of nickel, aluminum, and molybdenum powders. Powders produced from milling were analyzed using scanning electron microscopy (SEM) and X-ray diffractometry (XRD). Results showed that, with increasing the atomic percent of molybdenum, average grain size decreased from 3 to 0.5 m. Parameter lattice and lattice strain increased with increasing the atomic percent of molybdenum, while the crystal structure became finer up to 10 nm. Also, maximum microhardness was obtained for NiAl 49 Mo 1 alloy.

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Microstructure and mechanical properties of Ni3Al base alloy reinforced with Cr particles produced by powder metallurgy

Cited by 24 publications

References 24 publications

Porous titanium scaffolds produced by powder metallurgy for biomedical applications

Porous titanium scaffolds produced by powder metallurgy for biomedical applications

Evaluation of bone ingrowth into porous titanium implant: histomorphometric analysis in rabbits

Synthesis and Characterization of Nanocrystalline Ni₅₀Al_50−xMo_x (x = 0–5) Intermetallic Compound during Mechanical Alloying Process

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Microstructure and mechanical properties of Ni3Al base alloy reinforced with Cr particles produced by powder metallurgy

Cited by 24 publications

References 24 publications

Porous titanium scaffolds produced by powder metallurgy for biomedical applications

Porous titanium scaffolds produced by powder metallurgy for biomedical applications

Evaluation of bone ingrowth into porous titanium implant: histomorphometric analysis in rabbits

Synthesis and Characterization of Nanocrystalline Ni50Al50−xMox (x = 0–5) Intermetallic Compound during Mechanical Alloying Process

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Synthesis and Characterization of Nanocrystalline Ni₅₀Al_50−xMo_x (x = 0–5) Intermetallic Compound during Mechanical Alloying Process