### Compressive properties of Al-A206/SiC and Mg-AZ91/SiC

Metal matrix syntactic foams are promising materials with high energy absorption capability. To study the effects of matrix strength on the quasistatic compressive properties of syntactic foams using SiC hollow particles as reinforcement matrices of Al-A206 and Mg-AZ91 were used.

Get Price### Formation of dense silicon carbide by liquid silicon

Influences on the Carbon Preform Porosity and Microstructure Evolution of MiCaSiC Ceramics The effect of porous carbon preform and the infiltration process on the properties of reaction-formed SiC. Carbon 42 Effect of Sintering Additive and Pyrolysis Temperatures on Porous Silicon Carbide. Key Engineering Materials Vol. 659 Issue. p.

Get Price### Mechanical and microstructural properties of cordierite

Jan 16 2018 · Cordierite-bonded porous SiC ceramics were prepared by air sintering of cordierite sol infiltrated porous powder compacts of SiC with graphite and polymer microbeads as pore-forming agents. The effect of sintering temperature type of pore former and its morphology on microstructure mechanical strength phase composition porosity and pore size distribution pattern of porous SiC

Get Price### Influence of SiC infiltration on some properties of porous

Aug 01 2003 · Influence of SiC infiltration on some properties of porous carbon materials. they investigate properties of materials for practical applications The results showed the complex nature of phenomena during the infiltration. For low porous EK specimens only a small increase in velocity of about 10 m −1 s comparable with the accuracy of

Get Price### Numerical modeling of liquid-phase infiltration in the

Apr 29 2014 · The paper presents a numerical model for infiltration of porous preforms of ceramic materials in the process of sintering. The mathematical model of infiltration is based on the Richards equation and Van Genuchten formulas describing permeability properties of the porous structure and the infiltrant. A finite-element method and stable implicit finite-difference time scheme are applied for

Get Price### Permeability and Nanoparticle Filtration Assessment of

Cordierite bonded porous SiC ceramics having pore fractions (ε) between 0.33 and 0.72 and pore sizes of 6–50 μm flexural strength of 5–54 MPa and elastic modulus of 6–42 GPa were prepared by oxide bonding at 1350 °C in air compacts of SiC Al2O3 and MgO powders with petroleum coke (PC) as the sacial pore former. To test the applicability of the porous ceramics in the fluid flow

Get Price### Influence of a Two-Stage Sintering Process on

In this paper the two-stage sintering process as a promising strategy has been adopted to prepare high-performance porous ceramics with high porosity. Sewage sludge and waste coal ash were used as raw materials and added were starch and CaCO 3 as a mixed foaming agent. The chemical composition of the raw materials and mixed foaming agents were analyzed by standard techniques.

Get Price### Ablation of C/SiC–HfC composite prepared by precursor

Abstract Carbon fiber reinforced silicon carbide–hafnium carbide (C/SiC–HfC) composite was prepared by precursor infiltration and pyrolysis process. Then ablation behavior of C/SiC–HfC was evaluated in plasma wind tunnel. It was found that oxide layer formed during ablation significantly influenced the surface temperature.

Get Price### Influence of Fabricated Process on Mechanical Properties

Request PDF Influence of Fabricated Process on Mechanical Properties of Porous SiC-Particle/Si 3 N 4 Composites In this paper the mechanical properties of porous Si3N 4SiC composite prepared

Get Price### The Influence of Selected Liquid and Soil Properties on

just infiltration involving the influence of both gravity and capillary suction. Water-retention properties for these soils are expressed in an analytical form that permitted simulating imbibition of the 10 liquids into any of the 4 soils. A fluid-soil scaling rule was used to convert water-

Get Price### Manufacturing of open-cell aluminum foams via infiltration

where ρ f and ρ s represent densities of the green foam and bulk aluminum (about 2.7 g cm −3) respectively.The density of the aluminum foam ρ f was determined by measuring the mass and calculating the volume from the known physical dimensions.. 3. Results 3.1 Infiltration casting in super-gravity fields Fig. 2 shows images of the aluminum foams obtained at P c = 353 kPa (G = 500) with

Get Price### "Processing properties and prospects for melt infiltrated

Therefore Si-SiC composites containing 10-45 vol Si were fabricated using melt-infiltration process and their microstructure and mechanical properties were measured between °C. Elastic modulus strength and creep behaviors were studied including the influence of the Si content on these properties.

Get Price### Microstructure and Tensile Properties of BN/SiC Coated Hi

After CVI SiC infiltration the preforms are rigid and porous. The interconnected open porosity in the preforms can be filled with matrix by the melt infiltration (MI) sol gel or polymer infiltration pyrolysis methods. For the fabrication of SiC/SiC composites by the nonreactive melt infiltration method the SiC

Get Price### Influence of Carbon Cloth Filaments Upon the Properties of

In this paper 2D C/SiC composites with different carbon cloth filaments (1K 3K) were prepared via precursor infiltration and pyrolysis (PIP) process. The flexural strength of 2D-1K C/SiC composites was 380MPa and fracture toughness was 16.8MPa-m1/2 while those of 2D-3K C/SiC were 305MPa and 14.4MPa-m1/2 respectively. The differences of these two composites were analyzed from fiber

Get Price### Mechanical properties of wood-derived silicon carbide

tion and orientation of the pores affect the properties of the porous SiC 12 13 but the influence of these factors which are determined by the wood precursor on the me-chanical properties of the MCCs are not known. Producing SiC from wood offers several advantages over conventional ceramic processing methods.1 Low

Get Price### Microstructures and properties of Si-Zr alloy based CMCs

Oct 01 2018 · The microstructure and properties of the RMI-based CMCs are seriously influenced by the porous C/C composite preforms because the amount of the infiltrated molten melts is closely dependent on the preform porosities. Higher porosity in general corresponds to more molten melts infiltrated into C/C preforms.

Get Price### SiC/Si composites elaboration by capillary infiltration of

May 30 2018 · The effects of the SiC particles presintering on the pore size have been studied as they can affect the liquid infiltration. In this aim the influence of the heating on the pore size of the SiC compacts is established by mercury porosimetry and by hexadecane capillary infiltration at

Get Price### Numerical modeling of liquid-phase infiltration in the

Apr 29 2014 · The paper presents a numerical model for infiltration of porous preforms of ceramic materials in the process of sintering. The mathematical model of infiltration is based on the Richards equation and Van Genuchten formulas describing permeability properties of the porous structure and the infiltrant. A finite-element method and stable implicit finite-difference time scheme are applied for

Get Price### Processing and properties of macroporous silicon carbide

Sep 01 2013 · Porous SiC ceramics are essential in a variety of industries due to their unique combination of properties such as excellent mechanical strength good chemical resistance high thermal conductivity low thermal expansion coefficient and high thermal shock resistance. These properties cannot be achieved from their conventional dense counterparts.

Get Price### Microstructure and Tensile Properties of BN/SiC Coated Hi

After CVI SiC infiltration the preforms are rigid and porous. The interconnected open porosity in the preforms can be filled with matrix by the melt infiltration (MI) sol gel or polymer infiltration pyrolysis methods. For the fabrication of SiC/SiC composites by the nonreactive melt infiltration method the SiC

Get Price### Thermal Conductivity of Biomorphic Porous SiC Based Ceramics

SiC-Si3N4 and d) SiC coated with a thin layer of TiO2. The aim is to learn more about the factors influencing the thermal conductivity in porous ceramics. EXPERIMENTAL Processing of biomorphic porous SiC ceramic composites by chemical vapor infiltration and reaction (CVI-R) technique

Get Price### Numerical modeling of liquid-phase infiltration in the

Apr 29 2014 · The paper presents a numerical model for infiltration of porous preforms of ceramic materials in the process of sintering. The mathematical model of infiltration is based on the Richards equation and Van Genuchten formulas describing permeability properties of the porous structure and the infiltrant. A finite-element method and stable implicit finite-difference time scheme are applied for

Get Price### Thermal Conductivity of Biomorphic Porous SiC Based Ceramics

SiC-Si3N4 and d) SiC coated with a thin layer of TiO2. The aim is to learn more about the factors influencing the thermal conductivity in porous ceramics. EXPERIMENTAL Processing of biomorphic porous SiC ceramic composites by chemical vapor infiltration and reaction (CVI-R) technique

Get Price### Fabrication chemical etching and compressive strength of

Fabrication chemical etching and compressive strength of porous biomimetic SiC for medical implantsVolume 23 Issue 12Carmen Torres-Raya David Hernandez-Maldonado Joaquin Ramirez-Rico Carmen Garcia-Gañan Antonio R. de Arellano-Lopez Julian Martinez-Fernandez

Get Price### Processing and properties of SiC composites made via

article osti_ title = Processing and properties of SiC composites made via binder jet 3D printing and infiltration and pyrolysis of preceramic polymer author = Cramer Corson L. and Armstrong Herb and Flores‐Betancourt Alexis and Han Lu and Elliott Amy M. and Lara‐Curzio Edgar and Saito Tomonori and Nawaz Kashif abstractNote = The effect of polymer infiltration and

Get Price### EFFECT OF NANO SiC ADDITIVE ON MCMB-SiC COMPOSITE

prior studies exists on the effect of nano-SiC powder as dopant on the sintering and properties of MCMBs. In this work MCMBs with different amounts of nano SiC additive was first used to make a porous carbon preform and then the MCMB-SiC composite was prepared by liquid silicon infiltration. The mechanical and physical properties as well as

Get Price### INFLUENCE OF THE INFILTRATION PROCESS ON PROPERTIES

while the infiltration process allows density close to the theoretical value. The apparent hardness Rockwell B of the as sintered samples depends on the density values the lowest hardness properties are shown by the as sintered samples compacted at 500 MPa while the infiltration process allows very interesting hardness values higher than those

Get Price### Reaction-Bonded Silicon Carbide by Reactive Infiltration

The kinetics of unidirectional infiltration of silicon melt into microporous carbon preforms as a function of pore morphology and melt temperature is investigated in this paper. Qualitative agreement between experimental data and a mathematical model for capillarity-driven fluid flow through cylindrical pores is

Get Price### Processing properties and prospects for melt infiltrated

The high temperature mechanical properties of MI composites may be limited by the properties of the fiber and Si-SiC matrix. In particular the matrix properties depend on the amount of Si in the Si-SiC matrix phase. Therefore Si-SiC composites containing 10-45 vol Si were fabricated using melt-infiltration process and their

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