Microstructure, phase compositions and mechanical properties of slip cast sintered SiC/Si3N4 composites

2021 ◽  
Author(s):  
Shohreh Shahrestani ◽  
Mokhtar Che Ismail ◽  
Saeid Kakooei ◽  
Mohammadali Beheshti
Keyword(s):  
Mechanical Properties ◽  
Slip Cast

scholarly journals Dense lanthanum silicate oxyapatite ceramics obtained by uniaxial pressing and slip casting

2018 ◽  
Vol 50 (4) ◽  
pp. 433-443
Author(s):  
Ramiro Toja ◽  
Nicolás Rendtorffa ◽  
Esteban Agliettia ◽  
Tetsuo Uchikoshi ◽  
Yoshio Sakka ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Vickers Hardness ◽  
Growth Process ◽  
Slip Casting ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Oxygen Ion Conductivity ◽  
Oxygen Ion ◽  
Slip Cast ◽  
Lanthanum Silicate

Lanthanum silicate oxyapatite (LSO) is a promising ion conductive ceramic material, which has higher oxygen ion conductivity at intermediate temperatures (600-800?C) compared to yttria-stabilized zirconia. Its mechanical properties, though important for any of its applications, have been scarcely reported. In this study, we compare apparent densification, open porosity and Vickers hardness of samples conformed by uniaxial pressing and slip casting and fired up to 1600?C. Colloidal processing was optimized for slip casting in order to get high green densities. At sintering temperatures higher than 1400?C, both processing routes yielded comparable densities, although uniaxially pressed samples show slightly better mechanical properties, evidencing that slip cast ones already underwent a grain growth process.

scholarly journals Mechanical properties and ageing resistance of slip cast and pressurelessly sintered ZTA - the influence of composition and heat treatment conditions

2019 ◽  
Vol 51 (3) ◽  
pp. 243-256 ◽  
Author(s):  
Nicole Yildirim ◽  
Frank Kern
Keyword(s):  
Mechanical Properties ◽  
Biomedical Applications ◽  
High Strength ◽  
High Tendency ◽  
Mechanical And Tribological Properties ◽  
Treatment Conditions ◽  
Stabilizer Concentration ◽  
Slip Cast ◽  
Sintering Conditions ◽  
Zirconia Toughened Alumina

Zirconia toughened alumina (ZTA) ceramics are used in a broad range of mechanical engineering and biomedical applications due to their excellent mechanical and tribological properties. In this study it was tried how the change in stabilizer composition and sintering conditions can be exploited to selectively modify the mechanical properties and low temperature degradation resistance of ZTA materials with a typical biomedical grade composition. It was found that the materials react very sensitively to such changes. Fully dense materials combining favorable mechanical properties such as high strength > 800 MPa, fracture toughness > 5.5 MPa?m and LTD resistance can only be produced in a narrow stabilizer concentration range between 1.1-1.2 %. Beyond this range materials are either insufficiently stabilized which results in poor strength and high tendency to LTD, or over stabilized and no longer susceptible to stress induced phase transformation and therefore too brittle. Changes in reinforcement mechanisms can be attributed to changes in microstructure and phase composition caused by variation of stabilizer content and sintering conditions.

scholarly journals Microstructure and mechanical properties study of slip-cast copper–alumina composites

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
M. Stratigaki ◽  
W. Pabst ◽  
V. Nečina ◽  
M. Hajíček ◽  
A. D. Gotsis
Keyword(s):  
Mechanical Properties ◽  
Microstructure And Mechanical Properties ◽  
Alumina Composites ◽  
Slip Cast

Optical and mechanical properties of compaction and slip cast processed transparent polycrystalline spinel ceramics

2014 ◽  
Vol 40 (4) ◽  
pp. 5575-5581 ◽  
Author(s):  
Pandu Ramavath ◽  
Papiya Biswas ◽  
Kotikalapudi Rajeswari ◽  
Madireddy Buchi Suresh ◽  
Roy Johnson ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Slip Cast ◽  
Optical And Mechanical Properties

Effect of Mechanical Activation on Microstructure and Mechanical Properties of Aqueous Colloidal Processed Nickel Metal Matrix Nanocomposites

2012 ◽  
Vol 727-728 ◽  
pp. 195-199 ◽  
Author(s):  
L.E. Vieira ◽  
João B. Rodrigues Neto ◽  
Aloísio Nelmo Klein ◽  
Dachamir Hotza ◽  
Rodrigo Moreno
Keyword(s):  
Mechanical Properties ◽  
Mechanical Activation ◽  
Vickers Microhardness ◽  
Aqueous Suspension ◽  
Slip Casting ◽  
Nickel Metal ◽  
Metal Matrix Nanocomposites ◽  
Cast Composites ◽  
Slip Cast ◽  
Matrix Nanocomposites

Previous works studied the colloidal processing of nickel-silica and nickel-titania nanocomposites fabricated via slip casting. A rheological approach was used to characterize and optimize a 30 vol.% nickel aqueous suspension with up to 10 vol.% SiO2and 5 vol.% TiO2nanoparticles. In this work, the effect of mechanical activation of Ni-SiO2and Ni-TiO2nanocomposites on microstructural and mechanical properties was studied. For this aim Ni-SiO2and Ni TiO2slip-cast compacts were attrition milled for up to 12 hours. Green bodies of the mechanical-alloyed powders were obtained by cold pressing (300 MPa). Next, those green bodies were annealed at 700°C for 1 h, repressed at 700 MPa and sintered at 900°C for 1 h in flowing Ar/5%H2atmosphere. Porous and dense materials were characterized by SEM/FESEM, Archimedes densities and Vickers microhardness measurements. Mechanical alloying produces a remarkable improvement on microstructure homogenization, sintering densification and hardness comparing with slip-cast composites.

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