Thermal shock behavior of rare earth modified alumina ceramic composites

2017 ◽  
Vol 108 (5) ◽  
pp. 390-395 ◽  
Author(s):  
Junlong Sun ◽  
Changxia Liu
Keyword(s):  
Rare Earth ◽  
Thermal Shock ◽  
Ceramic Composites ◽  
Alumina Ceramic ◽  
Modified Alumina ◽  
Thermal Shock Behavior

Thermal Shock Behavior of Fiber-Reinforced Ceramic Composites

1994 ◽  
Vol 365 ◽  
Author(s):  
Raj N. Singh ◽  
Hongyu Wang
Keyword(s):  
Thermal Shock ◽  
Thermal Stresses ◽  
Fiber Type ◽  
Damage Mechanism ◽  
Ceramic Composites ◽  
Fiber Reinforced ◽  
Quench Temperature ◽  
Monolithic Ceramics ◽  
Thermal Shock Behavior ◽  
Original Strength

ABSTRACTThe influence of fiber type and method of composite fabrication on the thermal shock behavior of 2-D fiber-reinforced ceramic composites is studied. Thermal shock tests are performed using a water quench technique, and thermal shock damage is characterized by both destructive and nondestructive techniques. It is shown that the composites possessed superior resistance to thermal shock damage than the monolithic ceramics. Catastrophic failure due to severe thermal stresses is prevented in composites and a significant portion of their original strength is retained at a quench temperature difference up to 1000°C. These results along with an analysis of the thermal shock damage mechanism based on the destructive and nondestructive tests is described.

Thermal Shock Behavior of the SiC-SiC Joints Joined with Na2O-B2O3-SiO2 Glass Solder

2012 ◽  
Vol 27 (3) ◽  
pp. 234-238 ◽  
Author(s):  
Zhao-Hua LUO ◽  
Dong-Liang JIANG ◽  
Jing-Xian ZHANG ◽  
Qing-Ling LIN ◽  
Zhong-Ming CHEN ◽  
...  
Keyword(s):  
Thermal Shock ◽  
Thermal Shock Behavior

Plasma Sprayed WC-12%Co-Coatings for TBC Applications on Diesel Engine Piston

2019 ◽  
Vol 7 (1) ◽  
pp. 37-54 ◽  
Author(s):  
Debasish Das ◽  
Rajeev Verma ◽  
Vipul Pathak
Keyword(s):  
Diesel Engine ◽  
Thermal Shock ◽  
Structural Changes ◽  
Strain Analysis ◽  
Sem Analysis ◽  
Thermal Barrier ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum ◽  
Thermal Shock Behavior ◽  
Plasma Sprayed

In the present study, plasma sprayed WC-12%Co coatings with 100µm NiCrAlY bond coat on a substrate of A336 cast aluminum alloy have been investigated for a thermal barrier coating (TBC) application. The coatings deposited with varying topcoat thickness up to 500µm were deposited on the piston top surface of an Indian hatchback diesel car to act as a thermal barrier and enhance the thermal efficiency of the engine. Although all the specimens with distinct coating overlays survived 350 thermal cycles, the one with 200µm thickness exhibited the best thermal shock behavior as they exuded the most cycles to surface cracks initiation. Moreover, SEM analysis also suggested 200 µm thick coating to be optimal for thermal shock behavior in diesel engine components. The coating phase analysis by XRD and the lattice strain analysis performed by a Williamson-Hall (W-H) analysis did not reveal any structural changes after the thermal shock experiment.

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