Fabrication of nanopowder and consolidation of nanocrystalline 5Ni0.6Fe0.4-Al2O3 composite by rapid sintering

Park, Na-Ra; Choe, Myeong-Ku; Park, Je-Shin; Kim, Wonbaek; Shon, In-Jin

doi:10.1007/s12540-009-0765-x

Cited by 3 publications

(3 citation statements)

References 21 publications

(11 reference statements)

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“…[12,[16][17][18][19][20][21][22][23][24][25][26][27] Wang et al [16] reported that the fracture toughness of Ni-Mn-Ga-Fe alloys increased with increasing the Fe content by the fracture mode change from intergranular to transgranular. However, improvement of fracture properties of ferromagnetic shape memory alloys by particle distribution in relation to the microstructural modification was only rarely reported.…”

Section: Introductionmentioning

confidence: 99%

In-Situ Fracture Observation and Fracture Toughness Analysis of Ni-Mn-Ga-Fe Ferromagnetic Shape Memory Alloys

Euh

Lee

Nam

et al. 2011

Metall Mater Trans A

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The fracture property improvement of Ni-Mn-Ga-Fe ferromagnetic shape memory alloys containing ductile c particles was explained by direct observation of microfracture processes using an in-situ loading stage installed inside a scanning electron microscope (SEM) chamber. The Ni-Mn-Ga-Fe alloys contained a considerable amount of c particles in b grains after the homogenization treatment at 1073 K to 1373 K (800°C to 1100°C). With increasing homogenization temperature, c particles were coarsened and distributed homogeneously along b grain boundaries as well as inside b grains. According to the in-situ microfracture observation, c particles effectively acted as blocking sites of crack propagation and provided the stable crack growth, which could be confirmed by the R-curve analysis. The increase in fracture resistance with increasing crack length improved overall fracture properties of the Ni-Mn-Ga-Fe alloys. This improvement could be explained by mechanisms of blocking of crack propagation and crack blunting and bridging.

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Section: Introductionmentioning

confidence: 99%

In-Situ Fracture Observation and Fracture Toughness Analysis of Ni-Mn-Ga-Fe Ferromagnetic Shape Memory Alloys

Euh

Lee

Nam

et al. 2011

Metall Mater Trans A

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“…[8][9][10] There have been several successful examples of its use. Song et al 11) established the thermodynamic basis of YAG fabrication by combustion synthesis through a study of the adiabatic temperature of many aluminothermic systems.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Aspects during the Preparation of Y3Al5O12 by Combustion Synthesis and Temperature Field Simulation

Song

Chen

et al. 2011

Mater. Trans.

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The combustion front quenching method (CFQM) combined with the temperature field simulated using the finite element method was used to investigate the microstructural aspects of the fabrication of transparent Y 3 Al 5 O 12 via combustion synthesis. The simulated results indicate that there are three regions corresponding with the temperature distribution whose microstructural aspects were studied. The composite mixtures of the products cannot be separated depending only on their gravities. The filamentous profile of aluminum along with many aluminous intermediate products are detected by XRD, SEM and EDS analysis in the preheat region, which indicates that the heat-transfer can affect the mass-transfer process and the subsequent reaction process. The microstructural aspects show that the combustion reaction of the Al/NiO/Y 2 O 3 powder mixture was initiated by the melting of Al particles.

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“…Combustion synthesis, called self-propagating high-temperature synthesis (SHS), [9][10][11] can generate high temperatures without requiring alternative energy sources. For example, the adiabatic temperatures of NiO/Al and Fe 2 O 3 /Al aluminothermic systems reach 3524 K and 3622 K, respectively, which are above the melting points of products investigated thus far in the literature.…”

Section: Introductionmentioning

confidence: 99%

Predicting the Adiabatic Temperature of Transparent Y3Al5O12 Prepared via Combustion Synthesis under Ultra-High Gravity

et al. 2010

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In this paper, the adiabatic temperature of a transparent yttrium aluminum garnet (YAG) preparation using a NiO/Al/Y 2 O 3 aluminothermic system was calculated based on a thermodynamic theory. The results show that the adiabatic temperature without preheating reaches the 2891 K, which is higher than the melting points of YAG and Ni. The liquid phase mixture products can be separated and densified under ultra-high gravity (UHG). In the preheating temperature range of 620 K$2790 K to the reactants of this system, the adiabatic temperature is the same as 3156 K, the boiling point of Ni products. The theoretical analyses and experimental results prove the effectiveness of the YAG fabricated via combustion synthesis under an ultra-high gravity field.

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Fabrication of nanopowder and consolidation of nanocrystalline 5Ni0.6Fe0.4-Al2O3 composite by rapid sintering

Cited by 3 publications

References 21 publications

In-Situ Fracture Observation and Fracture Toughness Analysis of Ni-Mn-Ga-Fe Ferromagnetic Shape Memory Alloys

In-Situ Fracture Observation and Fracture Toughness Analysis of Ni-Mn-Ga-Fe Ferromagnetic Shape Memory Alloys

Microstructural Aspects during the Preparation of Y<SUB>3</SUB>Al<SUB>5</SUB>O<SUB>12</SUB> by Combustion Synthesis and Temperature Field Simulation

Predicting the Adiabatic Temperature of Transparent Y<SUB>3</SUB>Al<SUB>5</SUB>O<SUB>12</SUB> Prepared via Combustion Synthesis under Ultra-High Gravity

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