Phase transformation behavior of porous NiTi alloy fabricated by powder metallurgical method

Hosseini, Seyed Alireza; Sadrnezhaad, S.K.; Ekrami, A.

doi:10.1016/j.msec.2009.05.006

Cited by 25 publications

(16 citation statements)

References 21 publications

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“…Sample LP, on the other hand, has higher loading stiffness values (22)(23)(24)(25)(26) which exceed those recorded for foams with 32-36% equiaxed porosity created by HIP densification with NaCl spaceholders (4-6 GPa) [8]. It has been shown in CP-Ti that LENSfabricated foams with elongated and orthogonal micro-channels aligned normal to the loading direction are stiffer than titanium with equiaxed pores [50].…”

Section: Stiffnessmentioning

confidence: 90%

“…[4]. Powder metallurgy techniques used for creating porous NiTi include partial powder sintering [16][17][18][19][20][21][22][23][24][25], transient liquid phase sintering [26,27], expansion of argon entrapped during hot isostatic pressing (HIP) of powders [28][29][30][31], self-propagating high-temperature synthesis (SHS) [7,[32][33][34][35][36][37][38], metal injection molding (MIM) followed by sintering or SHS [39,40], and combinations of these techniques with various space-holder materials. Also, laser engineered net shaping (LENS) [41] and selective laser sintering (SLS) [42,43] have recently been employed to fabricate NiTi scaffolds from powders.…”

Section: Introductionmentioning

confidence: 99%

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Shape-memory NiTi with two-dimensional networks of micro-channels

Neurohr

Dunand

2011

Acta Biomaterialia

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Section: Stiffnessmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Shape-memory NiTi with two-dimensional networks of micro-channels

Neurohr

Dunand

2011

Acta Biomaterialia

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“…Radiation-transferred heat was measured using an infrared radiation camera [39][40][41]. The results show that the radiation efficiency decreases with increasing flame velocity and equivalence ratio [42][43][44].…”

Section: Methodsmentioning

confidence: 99%

Experimental Assessment of Thermal Radiation Behavior Emitted by Solid Porous Material

Caetano¹,

Lorenzini²,

Lhamby³

et al. 2020

IJHT

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Porous media burners have been the focus of many studies due to the advantage in different applications in industry, which exhibit a directional emission of thermal radiation and low emission of pollutants. Indeed, these characteristics yields benefits regarding productivity by an environment friendly process. Thus, this work analyzes the behavior of radiation heat flux emitted by materials of different linear densities and porosities, varying the rate of air/fuel mixture and the flame power. In this way, was constructed an experimental setup that consists in a supply system of air/fuel, data acquisition, burner support for the radiation sensor, and the radiometer. This structure enables the displacement from 0°C to 90°C allowing the analysis of radiation in the area of a semisphere. The results shown that the silicon carbide has higher radiation efficiency than zirconia, due the higher thermal conductivity and emissivity. However, the silicon carbide degraded in one of the measurements. The ZrO2 media has proved challenging to stabilize for equivalence ratios below 0.6. Regarding the porosity, it is concluded that the higher the porosity, the greater the radiation efficiency, the expected result because there is a larger contact area for the reaction to occur within the pores.

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“…Repeated conversions can cause "two-way" memory behaviour [50]. Ni-rich Nitinol can exhibit a delicate shape memory behavior related to the B2/rhombohedral structural alteration [16].…”

Section: Superelasticity (Se) and Shape Memory Effect (Sme)mentioning

confidence: 99%

“…Meanwhile, porosity can help to reduce Young's modulus of the metallic parts. Porosity has other benefits like great cell exchange and bone growth [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Nitinol Spinal Vertebrae: A Favorable New Substitute

Sadrnezhaad

Parsafar

Rashtiani

et al. 2019

IJE

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A B S T R A C TScoliosis, kyphosis, and bone fracture are health problems, especially of the elderly throughout the world. The vertebra protects the spinal cord. Any impairment to the vertebra can lead to pain and nervousness. Ni-Ti alloy (Nitinol) helps to resolve the problem by fulfilling such requirements as for strength, durability, resistance to wear, and shockwave damping which is due to the shape memory effect. Nitinol medical applications have so far been restricted to surgical devices and orthopaedics. Little has been said about Nitinol use for medication of the spinal vertebra disorder. This article appraises the potential features of Nitinol for vertebral implantation and therapeutic prescription consistent with the specific anatomical variation. Staples, screws, cages, stents, and posterior-stabilizers made of Nitinol have passed in-vitro tests and in some cases in-vivo examinations. Using anatomically tailored Nitinol for treatment and administration of the damaged vertebra is proposed as a forecastable dream.

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Phase transformation behavior of porous NiTi alloy fabricated by powder metallurgical method

Cited by 25 publications

References 21 publications

Shape-memory NiTi with two-dimensional networks of micro-channels

Shape-memory NiTi with two-dimensional networks of micro-channels

Experimental Assessment of Thermal Radiation Behavior Emitted by Solid Porous Material

Nitinol Spinal Vertebrae: A Favorable New Substitute

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