Fabrication of NiTi and NiTi-nano Al2O3 composites by powder metallurgy methods: Comparison of hot isostatic pressing and spark plasma sintering techniques

Farvizi, M.; Javan, M. Kahkhaei; Akbarpour, M.R.; Kim, H.S.

doi:10.1016/j.ceramint.2018.06.025

Cited by 31 publications

(26 citation statements)

References 24 publications

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“…Conventional sintering (CS), hot isostatic pressing (HIP), spark plasma sintering (SPS), selective laser melting (SLM), Metal injection molding (MIM), microwave sintering (MS), and self-propagating high-temperature synthesis (SHS), are some of the more commonly used PM processes utilized for the fabrication of NiTi products. [103][104][105][106][107] Conventional sintering. Conventional sintering generally involves the elemental Ni and Ti powders being pressed into a compact, before being heated or sintered below the absolute melting temperature of the material.…”

Section: Powder Metallurgymentioning

confidence: 99%

“…SPS at lower temperatures and higher pressures can produce tertiary NiTi products with good workability and favorable transformation temperatures. 105,107 Other PM fabrication processes like HIP are also widely used for the manufacture of NiTi products, but generally display a more pronounced NiTi matrix decomposition than SPS.…”

Section: Powder Metallurgymentioning

confidence: 99%

Section: Synthesis and Manufacturing Of Smasmentioning

confidence: 99%

See 2 more Smart Citations

The role of NiTi shape memory alloys in quality of life improvement through medical advancements: A comprehensive review

Nair

Radhika

2022

Proc Inst Mech Eng H

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The significance of advanced smart materials in recent technological research and advancement is apparent from its extensive use in present day devices and instruments. Of the various smart materials in use today, the fascinating category of shape memory alloys (SMAs) is equipped with the ability to return to a previously memorized shape under certain thermomechanical or magnetic stimuli. The unique property of shape memory effect and superelasticity displayed by these materials along with good biocompatibility and corrosion resistance make them ideal for biomedical applications. The various applications of SMAs in surgical instruments, surgical implants, and assistive and rehabilitative devices have significant effect on the day to day life of people in the present age. Majority of these biomedical devices belong to the orthodontic, orthopedic, or surgical fields. Other remarkable applications of SMAs such as in the production of prostheses and orthoses designed through the biomimetic approach are also highly influential in improving the quality of life. The present paper provides an overview of the various properties of shape memory alloys and their applications in the biomedical field over the years, that have had a significant impact on the realm of medical science.

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Section: Powder Metallurgymentioning

confidence: 99%

Section: Powder Metallurgymentioning

confidence: 99%

Section: Synthesis and Manufacturing Of Smasmentioning

confidence: 99%

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The role of NiTi shape memory alloys in quality of life improvement through medical advancements: A comprehensive review

Nair

Radhika

2022

Proc Inst Mech Eng H

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“…powders after previous milling [15][16][17]. The plasma sintering process, through its high heating/cooling rates, minimizes the rate of decomposition of the NiTi compound [18]. However, the NiTi 2 phase is identified in the Mg + 10% A1 diffraction spectrum -although the complementary material quantity is small -only 10% -and is not present in the sample analysis Mg + 10% B1 (either below the apparatus detection limit, or it does not form at all in this sample).…”

Section: Composites Analysismentioning

confidence: 99%

Production and Structural Characterization of Some Magnesium Matrix Composites Reinforced with Amorphous/Nanocrystalline NiTi Particulates

Ciurdas¹,

Necsulescu²,

Pantilimon³

et al. 2019

Rev. Chim.

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Two mixtures of elemental nickel and titanium powders in atomic proportions of 50% Ni + 50% Ti and 32% Ni + 68% Ti, respectively, were ground for 40 hours in a high energy planetary mill. In the case of the first mixture, the mechanical alloying was totally produced, while for the second, the alloying was partial. In both mixtures, qualitative X-ray diffraction phase analysis revealed the presence of metastable phases, such as Ni HC and NiTi- R-phase. Also, the equiatomic mixture is characterized by a partially amorphous structure. 10% of each type of mixture submitted to milling was used as reinforcing element in the form of particulates for two magnesium matrix composites. They were obtained by sintering in the plasma at 590�C. In the case of the reinforced with the second mixture composite, the production of new phases other than the matrix and those present in the mixture of nickel and titanium powders after milling were recorded. The electron microscopy images of the two composites have resistant, free of micropores or microcracks matrix / particulates interfaces. The Mg-10% (32 at% Ni + 68 at% Ti) composite is characterized by Vickers hardness higher than that of the composite reinforced with the equiatomic mixture.

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“…The composites fabricated by this process show significant mechanical properties due to the uniform dispersion of reinforcement and near-net-shape formability. The PM process minimizes the possibility of microstructural inhomogeneity of fabricated composites 11 . It also prevents or minimizes the requirement of metal removal processes, which considerably reducing manufacturing cost 12 .…”

Section: Introductionmentioning

confidence: 99%

Physical and Mechanical Behavior of NiTi Composite Fabricated by Newly Developed Uni-Axial Compaction Die

Singh

Sharma²,

Sharma³

2021

Mat. Res.

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Owing to better mechanical properties and shape memory effect, the NiTi composites fabricated by powder metallurgy are suitable for biomedical implants. However, the excessive porosity and formation of micro-cracks are the major issues related to the NiTi composite. This work focused on developing crack-free dense NiTi composites by newly developed uni-axial compaction die. The work includes the design and manufacturing of uni-axial compaction die. The die was tested by SOLIDWORKS software in a simulated environment. Further, composite samples were successfully fabricated without circumferential micro-cracks at 1910.82 MPa compaction pressure. The effects of compaction pressure on microstructural, densification, and mechanical behavior of NiTi composites were also analyzed. Microstructural characterization shows that the Ni-rich phase increased and the Ti-rich phase decreased with the increase of compaction pressure. The porosity reduces from 17.04 to 8.75% by increasing the compaction pressure from 1273.88 to 1910.82 MPa, and a maximum density of 5.50 g.cm -3 was obtained. The NiTi 150 composite has similar Young's modulus, and compressive strength (6.93 GPa and 94.36 MPa) compared to cortical and cancellous bone. The high compaction pressure also increases the micro-hardness of NiTi composite up to 453.8 HV 0.5 .

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Fabrication of NiTi and NiTi-nano Al2O3 composites by powder metallurgy methods: Comparison of hot isostatic pressing and spark plasma sintering techniques

Cited by 31 publications

References 24 publications

The role of NiTi shape memory alloys in quality of life improvement through medical advancements: A comprehensive review

The role of NiTi shape memory alloys in quality of life improvement through medical advancements: A comprehensive review

Production and Structural Characterization of Some Magnesium Matrix Composites Reinforced with Amorphous/Nanocrystalline NiTi Particulates

Physical and Mechanical Behavior of NiTi Composite Fabricated by Newly Developed Uni-Axial Compaction Die

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