Microstructural analysis of W-SiCf/SiC composite

2015 ◽  
Vol 29 (06n07) ◽  
pp. 1540017
Author(s):  
Hanki Yoon ◽  
Jeongseok Oh ◽  
Gonho Kim ◽  
Hyunsu Kim ◽  
Heishichiro Takahashi ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Power Systems ◽  
Microstructural Analysis ◽  
Hot Press ◽  
Extreme High Temperature ◽  
Press Method ◽  
Shock Resistance ◽  
High Temperature Reactor ◽  
Sic Composites ◽  
Physical And Chemical

Continuous silicon carbide fiber-reinforced silicon carbide ( SiC f / SiC ) composites are promising structure candidates for future fusion power systems such as gas coolant fast channels, extreme high temperature reactor and fusion reactors, because of their intrinsic properties such as excellent mechanical properties, high thermal conductivity, good thermal-shock resistance as well as excellent physical and chemical stability in various environments under elevated temperature conditions. In this study, bonding of tungsten and SiC f / SiC was produced by hot-press method. Microstructure analyses were performed using SEM and TEM.

Corrosion resistance studies of aluminium 7075 / SiC composites materials in an acidic environment

2020 ◽  
Vol 10 (4) ◽  
pp. 48-52
Author(s):  
Manoharan E K ◽  
Singanan M
Keyword(s):  
Silicon Carbide ◽  
Corrosion Resistance ◽  
Base Alloy ◽  
Acid Corrosion ◽  
Microstructural Analysis ◽  
Vortex Method ◽  
Reinforcement Particle ◽  
Corrosion Properties ◽  
Sic Composites ◽  
Hcl Medium

The aluminium and silicon carbide-based composite (Al-SiC) material was prepared using commercially available analytical grade Al7075 alloy and SiC. Here the silicon carbide is used as reinforcement particles in the composites. The metal composites were developed using liquid melt techniques (Vortex method). The reinforcement material is introduced in different weight fractions in the range of 0 to 10% in this process. These Al-SiC specimens were used for assessment of its corrosion properties. The acid corrosion experiments were carried out at room temperature (30 ±1oC). The corrosion characteristics were estimated using the conventional weight loss method according to the procedure of ASTM G69-80. The composites performance was evaluated using microstructural analysis and the corrosion resistance tendency in different acidic environmental conditions. The SEM micrographs picture reveals that reinforcement particle was distributed uniformly. The corrosion test was conducted in HCl medium from 0.25N, 0.5N, 1M and 1.5 M respectively. The Al-SiC specimens were dipped in different HCl medium for four days in six experimental baths. Specimens were taken out from each test medium for every 24 hours and tested for its corrosion characteristics. It is observed that the corrosion rate in all HCl medium decreases with an increase in exposure time. This is due to the passivation of the Al-SiC surface induced by aluminium. It was observed that at the 10 w/w % of the aluminium metal matrix composite have higher corrosion resistance than the base alloy.

Hot-Press Method Applied to Anisotropy of Compressed Carbon Product

1968 ◽  
Vol 17 (177) ◽  
pp. 536-539
Author(s):  
Shinichi OTSUKI ◽  
Shoji HORI ◽  
Kanji MATSUO
Keyword(s):  
Hot Press ◽  
Carbon Product ◽  
Press Method

Electrical Resistance and Acoustic Emission During Fatigue Testing of Pristine and High Velocity Impact SiC/SiC Composites at Room and Elevated Temperature

2016 ◽  
Author(s):  
Zipeng Han ◽  
Gregory N. Morscher ◽  
Emmanuel Maillet ◽  
Manigandan Kannan ◽  
Sung R. Choi ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Acoustic Emission ◽  
Cyclic Loading ◽  
Electrical Resistance ◽  
Fatigue Testing ◽  
Early Stage ◽  
Loading Conditions ◽  
Initial Attempt ◽  
Matrix Cracks ◽  
Sic Composites

Electrical resistance (ER) is a relatively new approach for real-time monitoring and evaluating damage in SiC/SiC composites for a variety of loading conditions. In this study, ER of woven silicon carbide fiber-reinforced silicon carbide composite systems in their pristine and impacted state were measured under cyclic loading conditions at room and high temperature (1200C). In addition, modal acoustic emission (AE) was also monitored, which can reveal the occasion of matrix cracks and fiber. ER measurement and AE technique are shown in this study to be useful methods to monitor damage and indicate the failure under cyclic loading. Based on the slope of the ER evolution, an initial attempt has been made to develop a method allowing a critical damage phase to be identified. While the physical meaning of the critical point is not yet clear, it has the potential to allow the failure to be indicated at its early stage.

Fracture behavior of 3-d Braided Nicalon/Silicon Carbide Composite

1988 ◽  
Vol 120 ◽  
Author(s):  
J.-M. Yang ◽  
J.-C. Chou ◽  
C. V. Burkland
Keyword(s):  
Fracture Toughness ◽  
Silicon Carbide ◽  
Thermal Shock Resistance ◽  
Fracture Behavior ◽  
Ceramic Composite ◽  
Chemical Vapor ◽  
Chemical Vapor Infiltration ◽  
Fiber Architecture ◽  
Structural Ceramic ◽  
Shock Resistance

AbstractThe fracture behavior of a 3-D braided Nicalon fiber-reinforced SiC matrix composite processed by chemical vapor infiltration (CVI) has been investigated. The fracture toughness and thermal shock resistance under various thermomechanical loadings have been characterized. The results obtained indicate that a tough and durable structural ceramic composite can be achieved through the combination of 3-D fiber architecture and the low temperature CVI processing.

Rheological Behavior and Extrudate Swell of Polypropylene/Silicon Carbide Composites

2013 ◽  
Vol 747 ◽  
pp. 595-598 ◽  
Author(s):  
Apaipan Rattanapan ◽  
Nuttaphong Sornsuwit ◽  
Rapeephun Dangtungee
Keyword(s):  
Silicon Carbide ◽  
Shear Stress ◽  
Shear Viscosity ◽  
Rheological Behavior ◽  
Sem Analysis ◽  
Elongation Rate ◽  
Capillary Rheometer ◽  
Extrudate Swell ◽  
Elongation Viscosity ◽  
Sic Composites

The rheological behavior and extrudate swell of polypropylene (PP)/silicon carbide (SiC) composites were investigated. Polypropylene-grafted-maleic anhydride (PP-g-MA) was introduced into blending system as a compatibilizer. The effect of silicon carbide loading and surface modification on the rheological behavior of PP/SiC composites were studied using a capillary rheometer and SEM analysis. The results showed that the composites exhibit pseudoplastic behavior as the shear stress and extrudate swell increased with increasing shear rate, while shear viscosity decreased. Moreover, an increasing elongation rate leads to reduce elongation viscosity. The addition of PP-g-MA in PP/SiC composites has significantly decreased the apparent shear stress, apparent shear viscosity and percentage of extrudate swell.

scholarly journals Microstructural analysis of Al6063/sic with calcium additives for hardness enhancement

2018 ◽  
Vol 225 ◽  
pp. 03007
Author(s):  
Balaji Bakthavatchalam ◽  
Khairul Habib ◽  
Namdev Patil ◽  
Omar A Hussein
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Matrix Material ◽  
Microstructural Analysis ◽  
Wear Loss ◽  
Alloying Element ◽  
Silicon Phase ◽  
High Durability ◽  
The Matrix ◽  
Al6063 Alloy

Microstructural Analysis plays an important role in enhancing the mechanical properties of metals and composites. Usually Aluminium Silicon Carbide (Al6063/SiC) alloys are mixed with strontium, sodium and antimony for high durability even though they are toxic and costly. As an alternative calcium is used as an alloying element to improve the mechanical property of Al6063/Sic alloy. In this paper Al6063 is chosen as the matrix material while Sic is used as a reinforcement where calcium powder is added to modify the silicon phase of the composite. Finally, concentration of Silicon carbide is varied from 0 to 150 mg to produce four specimens of Al6063 alloy and it is subjected to microstructure analysis which showed the reduction of grain size and therefore improvement in the hardness from 52.9 HV to 58.4 HV and decrease in the wear loss from 3.97 to 3.27 percentage.

scholarly journals Preparation of Porous Hydroxyapatite Nanosolid by Solvent Hot Press Method

2004 ◽  
Vol 20 (06) ◽  
pp. 608-611
Author(s):  
Liu Xiu-Lin ◽  
◽  
Xu Hong-Yan ◽  
Meng Xian-Ping ◽  
Li Mei ◽  
...  
Keyword(s):  
Hot Press ◽  
Porous Hydroxyapatite ◽  
Press Method

Controllable synthesis of uniform ZnO nanorods and their enhanced dielectric and absorption properties

2014 ◽  
Vol 2 (23) ◽  
pp. 8644-8651 ◽  
Author(s):  
Guang-Sheng Wang ◽  
Ying-Ying Wu ◽  
Xiao-Juan Zhang ◽  
Yong Li ◽  
Lin Guo ◽  
...  
Keyword(s):  
Percolation Threshold ◽  
Reflection Loss ◽  
Filler Content ◽  
Zno Nanorods ◽  
Dielectric Behavior ◽  
Hot Press ◽  
Controllable Synthesis ◽  
Absorption Properties ◽  
Press Method ◽  
Two Peaks

The PVDF/ZnO composites were prepared by a simple hot-press method. The dielectric behavior of the composites was improved at a lower percolation threshold. For the composites with a filler content of 10 wt%, the reflection loss appears as two peaks that can reach −15.90 dB at 6.60 GHz and −25.44 dB at 16.48 GHz.

Properties of Bi-Pb-Sr-Ca-Cu-O Bulk Superconductors Prepared by a Hot-Press Method

1990 ◽  
pp. 701-704
Author(s):  
R. Yoshizaki ◽  
H. Ikeda ◽  
K. Yoshikawa ◽  
N. Tomita
Keyword(s):  
Hot Press ◽  
Bulk Superconductors ◽  
Press Method
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