Behavior of ceramic particles at the solid- liquid metal interface in metal matrix composites

Stefanescu, Doru M.; Dhindaw, B. K.; Kacar, S. A.; Moitra, A.

doi:10.1007/bf02645819

Cited by 239 publications

(111 citation statements)

References 7 publications

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“…8.9 g/cm 3 and 4.95 g/cm 3 respectively, and low wettability of TiB 2 particles by molten copper (i.e. wetting angle=136 º) [19], a larger size of TiB 2 particles was repulsed and redistributed toward the melt freezing interface and finally to grain boundaries while the majority of nano sized particles was remained inside the grain according to solid/liquid interface theories for MMCs [20,21]. From Fig.…”

Section: B)mentioning

confidence: 90%

Microstructural evolution of copper–titanium alloy during in-situ formation of TiB2 particles

Sobhani

Arabi

Mirhabibi

et al. 2013

Transactions of Nonferrous Metals Society of China

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Bulk Cu-Ti alloy reinforced by TiB 2 nano particles was prepared using in-situ reaction between Cu-3.4wt.% Ti and Cu-0.7wt.% B along with rapid solidification and subsequent heat treatment for 1-10 hrs at 900ºC. High-resolution transmission electron microscopy (HRTEM) characterization showed that primary TiB 2 nano particles and TiB whiskers were formed by in-situ reaction between Ti and B in the liquid copper. Formation of TiB whiskers within the melt led to coarsening of TiB 2 particles. Primary TiB 2 particles were dispersed along the grain boundaries and hindered grain growth at high temperature while the secondary TiB 2 particles were formed during heat treatment of the alloy by diffusion reaction of solute titanium and boron inside the grains. Electrical conductivity and hardness of composite were evaluated during heat treatment. The results indicated that formation of secondary TiB 2 particles in the matrix caused a delay in hardness reduction at high temperature. The electrical conductivity increased along with hardness up to 8 hrs of heat treatment and reached 33.5% IACS and 158 HV, respectively.

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Section: B)mentioning

confidence: 90%

Microstructural evolution of copper–titanium alloy during in-situ formation of TiB2 particles

Sobhani

Arabi

Mirhabibi

et al. 2013

Transactions of Nonferrous Metals Society of China

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“…-Stefanescu et al [16] observed that for particles SiC in aluminum alloys with small admixture of magnesium or nickel V kr values are critical for particles of radius 50 μm and stay within a broad range of 8-400 μm· s -1 . -Physically this phenomenon describes a system of forces acting on a particle and from which we have a velocity vector.…”

Section: Interaction Of Non-metallic Particle With Vertical Solidificmentioning

confidence: 99%

“…To solve set of ordinary differential equations presented above (eqs 2, 3) Euler's forward scheme witch constant time step ∆t is applied. The aim of the computations is to create the numerical sequence of following values: (16) which values are approximate positions and particle speeds at equidistant time steps. Consecutive values are given with following iterative formula:…”

Section: Numerical Model For Particle Movement Near To Crystallizatiomentioning

confidence: 99%

Interaction mechanism of non-metallic particles with crystallization front

Żak¹,

Kalisz²,

Rączkowski³

2017

Archives of Metallurgy and Materials

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The process of steel solidification in the CCS mould is accompanied by a number of phenomena relating to the formation of non-metallic phase, as well as the mechanism of its interaction with the existing precipitations and the advancing crystallization front. In the solidification process the non-metallic inclusions may be absorbed or repelled by the moving front. As a result a specific distribution of non-metallic inclusions is obtained in the solidified ingot, and their distribution is a consequence of these processes. The interaction of a non-metallic inclusion with the solidification front was analyzed for alumina, for different values of the particle radius. The simulation was performed with the use of own computer program. Each time a balance of forces acting on a particle in its specific position was calculated. On this basis the change of position of alumina particle in relation to the front was defined for a specific radius and original location of the particle with respect to the front.

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“…Hence, if The critical interface velocity criterion has been documented extensively [91][92][93]97].…”

Section: 4 Distribution Of Sic_ In the Al-li Matrixmentioning

confidence: 99%

“…where do is the interatomic distance, 1 is the viscosity of the melt, r is the radius of the particulate, Kp is thermal conductivity of the particulate material, KL is the thermal conductivity of the melt, n is a constant having integral values irom 2-7 [97]. ACo 0 is the difference in surface tension, as computed from:…”

Section: 4 Distribution Of Sic_ In the Al-li Matrixmentioning

confidence: 99%

Mechanical Behavior and Processing of Aluminum Metal Matrix Composites

Lavernia¹,

Mohamed²

1992

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Behavior of ceramic particles at the solid- liquid metal interface in metal matrix composites

Cited by 239 publications

References 7 publications

Microstructural evolution of copper–titanium alloy during in-situ formation of TiB2 particles

Microstructural evolution of copper–titanium alloy during in-situ formation of TiB2 particles

Interaction mechanism of non-metallic particles with crystallization front

Mechanical Behavior and Processing of Aluminum Metal Matrix Composites

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