Improvement toughness of SiC ceramic by adding Cr2O3 and annealing process

2021 ◽  
Author(s):  
Mahdi Khodaei ◽  
Omid Yaghobizadeh ◽  
Naser Ehsani ◽  
Hamid Reza Baharvandi ◽  
Mohammad Bagher Bayati ◽  
...  
Keyword(s):  
Annealing Process ◽  
Sic Ceramic

Microstructural Heterogenieties in a Commercial SiC Structural Ceramic:Hraem

1982 ◽  
Vol 40 ◽  
pp. 564-565
Author(s):  
W.M. Skiff ◽  
R.W. Carpenter
Keyword(s):  
Sic Ceramic ◽  
Second Phases ◽  
Structural Irregularities

SiC refractories made by various pressing and sintering methods may contain structural and chemical heterogenieties similar to tljiose reported for Si3N4 base refractories. Although some earlier work on SiC did not reveal second phases, other oxidation experiments showed the reaction to take place heterogeneously, leading to the supposition that such heterogenieties may be present. In this work we examine a typical commercial SiC ceramic to determine the existence of such structural irregularities.

Design of spline surface vacuum gripper for pick and place robotic arms

2020 ◽  
Vol 4 (2) ◽  
pp. 48-55
Author(s):  
A. S. Jamaludin ◽  
M. N. M. Razali ◽  
N. Jasman ◽  
A. N. A. Ghafar ◽  
M. A. Hadi
Keyword(s):  
Cycle Time ◽  
Industrial Robot ◽  
Annealing Process ◽  
Vacuum Suction ◽  
Robotic Arms ◽  
Custom Made ◽  
Pick And Place ◽  
Manufacturing Procedure ◽  
Production Flexibility ◽  
The Impact

The gripper is the most important part in an industrial robot. It is related with the environment around the robot. Today, the industrial robot grippers have to be tuned and custom made for each application by engineers, by searching to get the desired repeatability and behaviour. Vacuum suction is one of the grippers in Watch Case Press Production (WCPP) and a mechanism to improve the efficiency of the manufacturing procedure. Pick and place are the important process for the annealing process. Thus, by implementing vacuum suction gripper, the process of pick and place can be improved. The purpose of vacuum gripper other than design vacuum suction mechanism is to compare the effectiveness of vacuum suction gripper with the conventional pick and place gripper. Vacuum suction gripper is a mechanism to transport part and which later sequencing, eliminating and reducing the activities required to complete the process. Throughout this study, the process pick and place became more effective, the impact on the production of annealing process is faster. The vacuum suction gripper can pick all part at the production which will lower the loss of the productivity. In conclusion, vacuum suction gripper reduces the cycle time about 20%. Vacuum suction gripper can help lower the cycle time of a machine and allow more frequent process in order to increase the production flexibility.

Tuning the pinning direction of giant magnetoresistive sensor by post annealing process

2021 ◽  
Vol 64 (6) ◽  
Author(s):  
Zhiqiang Cao ◽  
Yiming Wei ◽  
Wenjing Chen ◽  
Shaohua Yan ◽  
Lin Lin ◽  
...  
Keyword(s):  
Annealing Process ◽  
Magnetoresistive Sensor ◽  
Post Annealing

scholarly journals Annealing Condition Effects on the Structural Properties of FePt Nanoparticles Embedded in MgO via Pulsed Laser Deposition

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 131
Author(s):  
Tingting Xiao ◽  
Qi Yang ◽  
Jian Yu ◽  
Zhengwei Xiong ◽  
Weidong Wu
Keyword(s):  
Pulsed Laser Deposition ◽  
Room Temperature ◽  
High Vacuum ◽  
Pulsed Laser ◽  
Annealing Process ◽  
Ultra High Vacuum ◽  
Laser Deposition ◽  
Fept Nanoparticles ◽  
Annealing Conditions ◽  
Vacuum Atmosphere

FePt nanoparticles (NPs) were embedded into a single-crystal MgO host by pulsed laser deposition (PLD). It was found that its phase, microstructures and physical properties were strongly dependent on annealing conditions. Annealing induced a remarkable morphology variation in order to decrease its total free energy. H2/Ar (95% Ar + 5% H2) significantly improved the L10 ordering of FePt NPs, making magnetic coercivity reach 37 KOe at room temperature. However, the samples annealing at H2/Ar, O2, and vacuum all showed the presence of iron oxide even with the coverage of MgO. MgO matrix could restrain the particles’ coalescence effectively but can hardly avoid the oxidation of Fe since it is extremely sensitive to oxygen under the high-temperature annealing process. This study demonstrated that it is essential to anneal FePt in a high-purity reducing or ultra-high vacuum atmosphere in order to eliminate the influence of oxygen.

Highly stable electrochromic cells based on amorphous tungsten oxides prepared using a solution‐annealing process

2021 ◽  
Author(s):  
Tuan Van Nguyen ◽  
Kim Anh Huynh ◽  
Quyet Van Le ◽  
Hayeong Kim ◽  
Sang Hyun Ahn ◽  
...  
Keyword(s):  
Annealing Process ◽  
Solution Annealing ◽  
Tungsten Oxides

scholarly journals Tuning the hierarchical pore structure of graphene oxide through dual thermal activation for high-performance supercapacitor

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jeongpil Kim ◽  
Jeong-Hyun Eum ◽  
Junhyeok Kang ◽  
Ohchan Kwon ◽  
Hansung Kim ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Pore Structure ◽  
Specific Capacitance ◽  
Surface Area ◽  
Thermal Annealing ◽  
High Performance ◽  
Annealing Process ◽  
Supercapacitor Electrode ◽  
Simple Method ◽  
Surface Areas

AbstractHerein, we introduce a simple method to prepare hierarchical graphene with a tunable pore structure by activating graphene oxide (GO) with a two-step thermal annealing process. First, GO was treated at 600 °C by rapid thermal annealing in air, followed by subsequent thermal annealing in N2. The prepared graphene powder comprised abundant slit nanopores and micropores, showing a large specific surface area of 653.2 m2/g with a microporous surface area of 367.2 m2/g under optimized conditions. The pore structure was easily tunable by controlling the oxidation degree of GO and by the second annealing process. When the graphene powder was used as the supercapacitor electrode, a specific capacitance of 372.1 F/g was achieved at 0.5 A/g in 1 M H2SO4 electrolyte, which is a significantly enhanced value compared to that obtained using activated carbon and commercial reduced GO. The performance of the supercapacitor was highly stable, showing 103.8% retention of specific capacitance after 10,000 cycles at 10 A/g. The influence of pore structure on the supercapacitor performance was systematically investigated by varying the ratio of micro- and external surface areas of graphene.

scholarly journals Sustainable Machining of Cf/SiC Ceramic Matrix Composite Using Green Cutting Fluids

Procedia CIRP ◽  
2021 ◽  
Vol 98 ◽  
pp. 151-156
Author(s):  
Shyam ◽  
M. Shanmuka Srinivas ◽  
Kishor Kumar Gajrani ◽  
A. Udayakumar ◽  
M. Ravi Sankar
Keyword(s):  
Matrix Composite ◽  
Ceramic Matrix Composite ◽  
Ceramic Matrix ◽  
Cutting Fluids ◽  
Sustainable Machining ◽  
Sic Ceramic
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