Fabrication of Co-Continuous ceramic composite (C4) through gas pressure infiltration technique

2021 ◽  
Author(s):  
Krishnaraj Vijayan ◽  
Sindhumathi Ramalingam ◽  
Mohamed Raeez Akthar Sadik ◽  
A.S. Prasanth ◽  
Jayakrishnan Nampoothiri ◽  
...  
Keyword(s):  
Ceramic Composite ◽  
Gas Pressure ◽  
Pressure Infiltration ◽  
Infiltration Technique

Characterisation of CF/AL-MMC Manufactured by Means of Gas Pressure Infiltration

2011 ◽  
Vol 690 ◽  
pp. 116-120 ◽  
Author(s):  
Werner Hufenbach ◽  
Maik Gude ◽  
Andrzej Czulak ◽  
Frank Engelmann ◽  
Krzysztof Jan Kurzydlowski ◽  
...  
Keyword(s):  
Traffic Engineering ◽  
Coefficient Of Thermal Expansion ◽  
Complex Loading ◽  
Machine Building ◽  
Gas Pressure ◽  
Al Alloy ◽  
Alloy Matrix ◽  
Pressure Infiltration ◽  
Deformation And Failure ◽  
Infiltration Technique

Constantly rising demands on extremely stressed lightweight structures, particularly in traffic engineering as well as in machine building and plant engineering, increasingly require the use of continuous fibre-reinforced composite materials. Due to their selectively adaptable characteristics profiles, they are clearly superior to conventional monolithic materials. Composites with textile reinforcement offer the highest flexibility for adaptation to reinforcing structures in to complex loading conditions. This study shows that the gas pressure infiltration technique was successfully assessed for manufacture of carbon fibre reinforced aluminium metal composites (CF/Al-MMCs), consisting of unidirectional as well as bidirectional Ni-coated carbon fibres with different Al-alloy matrix systems. As wail as investigating of the deformation and failure behaviour of CF/Al-MMCs, their thermo-physical properties, were determined such as the coefficient of thermal expansion. Furthermore, fractographic analysis and closer microscopic inspections indicate they fail with a brittle fracture.

Microstructure and Properties of Composites Prepared by Reactive Pressure Infiltration of Aluminium into Metal and Ceramic Powder Preforms

2014 ◽  
Vol 782 ◽  
pp. 523-526
Author(s):  
Andrej Opálek ◽  
Karol Iždinský ◽  
Štefan Nagy ◽  
František Simančík ◽  
Pavol Štefánik ◽  
...  
Keyword(s):  
Ceramic Powder ◽  
Nickel Aluminides ◽  
Gas Pressure ◽  
Alumina Powder ◽  
Pressure Infiltration ◽  
X Ray ◽  
Reactive Infiltration ◽  
Melting Temperatures ◽  
Ni Powder ◽  
Properties Of Composites

Nickel aluminides exhibit very attractive high temperature properties. However, due to high melting temperatures they are difficult to prepare. Gas pressure reactive infiltration is a relatively cheap technology that provides composites where nickel aluminides are formed due to mutual reaction between Ni powder and molten aluminium forced to penetrate into powder preform. The feasibility of this concept is demonstrated in this work. Ni powder and/or Ni+25 vol. % Al2O3 powder mixture, respectively, were mechanically pressed and then infiltrated with aluminium using 5 MPa argon gas pressure at the temperature of 750 °C for 120 s. Al/Al2O3 composite using loose alumina powder was prepared in similar manner for comparison. The microstructure of composites was observed by scanning electron microscopy and newly formed intermetallic phases were analysed by energy-dispersive X-ray spectroscopy. Relative elongations during additional thermal cycling up to 800 °C had been recorded. Composites were additionally characterized by hardness measurements.

scholarly journals Effect of Surfactants on Pressure Infiltration of Calcium Chloride Solutions into `Golden Delicious' Apples

1997 ◽  
Vol 122 (3) ◽  
pp. 386-391 ◽  
Author(s):  
Robert A. Saftner ◽  
J. George Buta ◽  
William S. Conway ◽  
Carl E. Sams
Keyword(s):  
Fruit Weight ◽  
Fruit Firmness ◽  
Pressure Infiltration ◽  
Chemical Structures ◽  
Golden Delicious ◽  
Infiltration Technique ◽  
Proportional Increase ◽  
Tween 60 ◽  
Triton X ◽  
Carbon Based

The effects of 36 organosilicone and conventional carbon-based surfactants on postharvest infiltration of radiolabeled and unlabeled Ca solutions into `Golden Delicious' apples (Malus domestica Borkh) were examined to devise a more efficient pressure infiltration technique to increase fruit Ca concentration. Radiolabeled Ca infiltration and the proportional increase in fruit Ca estimated by fruit weight gain from Ca solutions of known concentration were significantly enhanced by a range of surfactants having different chemical structures. Tween 60 and 80; Triton X-45, X-100, X-114, X-305, and X-405; and Silwet L-77 and L-7604 enhanced Ca infiltration. The two organosilicone surfactants, Silwet L-77 and Silwet L-7604, known for their greater capacity to lower the surface tension of solutions than conventional carbon-based surfactants, were the most effective at augmenting Ca infiltration. Applications of surfactants to fruit were as or more effective when used as a pretreatment rather than mixing the surfactant with the Ca solutions. The pressure necessary to increase Ca to levels considered sufficient to maintain fruit firmness and resist decay during storage could be lowered in fruit treated with organosilicone surfactants. Sequential postharvest surfactant and Ca treatments may be a practical means of increasing the Ca concentration in apples.

scholarly journals Synthesis of biomorphic SiC and SiO2 ceramics

2008 ◽  
Vol 73 (7) ◽  
pp. 745-751 ◽  
Author(s):  
Adela Egelja ◽  
Jelena Gulicovski ◽  
Aleksandar Devecerski ◽  
Biljana Babic ◽  
Miroslav Miljkovic ◽  
...  
Keyword(s):  
Porous Ceramics ◽  
X Ray Diffraction ◽  
Pressure Infiltration ◽  
X Ray ◽  
Carbon Template ◽  
Cellular Wall ◽  
Infiltration Technique ◽  
Coniferous Wood ◽  
Biomorphic Ceramics

Coniferous wood (fir) was transformed by pyrolysis into carbon preforms, which were subsequently converted into biomorphic ceramics by the pressure infiltration technique with colloidal silica. An in situ reaction between the silica and the carbon template occurred in the cellular wall at a high sintering temperature. Depending on the employed atmosphere, non-oxide (SiC) or oxide (SiO2) ceramics were obtained. The morphology of the resulting porous ceramics and their phase composition were investigated by scanning electron microscopy (SEM/EDX) and X-ray diffraction (XRD). The experimental results showed that the biomorphic cellular morphology of the wood maintained in both the SiC and silica ceramics, which consisted of only the b-SiC phase and SiO2, respectively. .

SiC – Zn Nanocomposites Obtained Using the High – Pressure Infiltration Technique

2006 ◽  
pp. 257-264 ◽  
Author(s):  
Anna Swiderska-Sroda ◽  
Grzegorz Kalisz ◽  
Ewa Grzanka ◽  
Stanislaw Gierlotka ◽  
Svetlana Stelmakh ◽  
...  
Keyword(s):  
High Pressure ◽  
Pressure Infiltration ◽  
Infiltration Technique

Study of Preforms of Quartzite for Production of Ceramic Matrix Composites

2008 ◽  
Vol 591-593 ◽  
pp. 430-435
Author(s):  
Adriana Scoton Antonio Chinelatto ◽  
R. Justus ◽  
Adilson Luiz Chinelatto ◽  
F.M.C.N. Nadal ◽  
E.A.T. Berg
Keyword(s):  
Squeeze Casting ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Matrix Composites ◽  
X Ray Diffraction ◽  
Flexure Strength ◽  
Pressure Infiltration ◽  
X Ray ◽  
Infiltration Technique ◽  
Sufficient Strength

The ceramic matrix composites (CMCs) can be fabricated by the pressure infiltration technique. In this work it was studied porous preforms of quartzite that were infiltrated with aluminum liquid. For to produce the more resistant preforms of quartzite, it was additioned different quantities of bentonite (5 and 10%) and the preforms were firing at 1100°C and 1200°C. For the composites production, the melted aluminum was introduced into preforms under a pressure of 7 MPa. The characterizations of the composites were made by X-ray diffraction, scanning electron microscopy, and flexure strength. All the preforms studied presented sufficient strength for support the pressing during the process of squeeze casting. The results of X-ray diffraction of composites showed the presence of alumina, silicon and aluminum and fully interpenetration aluminum-siliconalumina composites were obtained by infiltration.

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