Evaluations of cooling rate and initial temperature on thermal shock behavior of ZrB2-SiC ceramic

Taking the hafnium diboride ceramic as an example, the effects of heating rate, cooling rate, thermal shock initial temperature, and external constraint on the thermal shock resistance (TSR) of ultra-high temperature ceramics (UHTCs) were studied through numerical simulation in this paper. The results show that the external constraint has an approximately linear influence on the critical rupture temperature difference of UHTCs. The external constraint prepares a compressive stress field in the structure because of the predefined temperature field, and this compressive stress field relieves the tension stress in the structure when it is cooled down and then it improves the TSR of UHTCs. As the thermal shock initial temperature, a danger heating rate (or cooling rate) exists where the critical temperature difference is the lowest.

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Thermal shock behavior of rare earth modified alumina ceramic composites

International Journal of Materials Research (formerly Zeitschrift fuer Metallkunde) ◽

10.3139/146.111490 ◽

2017 ◽

Vol 108 (5) ◽

pp. 390-395 ◽

Cited By ~ 1

Author(s):

Junlong Sun ◽

Changxia Liu

Keyword(s):

Rare Earth ◽

Thermal Shock ◽

Ceramic Composites ◽

Alumina Ceramic ◽

Modified Alumina ◽

Thermal Shock Behavior

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

Journal of Inorganic Materials ◽

10.3724/sp.j.1077.2012.00234 ◽

2012 ◽

Vol 27 (3) ◽

pp. 234-238 ◽

Cited By ~ 2

Author(s):

Zhao-Hua LUO ◽

Dong-Liang JIANG ◽

Jing-Xian ZHANG ◽

Qing-Ling LIN ◽

Zhong-Ming CHEN ◽

...

Keyword(s):

Thermal Shock ◽

Thermal Shock Behavior

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Theoretical Aspccts of Cloud Drop Distributions

Australian Journal of Chemistry ◽

10.1071/ch9490376 ◽

1949 ◽

Vol 2 (3) ◽

pp. 376 ◽

Cited By ~ 3

Author(s):

EB Kraus ◽

B Smith

Keyword(s):

Cooling Rate ◽

Drop Size ◽

Initial Temperature ◽

Theoretical Study ◽

Air Pressure ◽

Size Spectrum ◽

Condensation Nuclei ◽

Cloud Drop ◽

Rate Of Cooling

A theoretical study indicates that the number and size of the drops formed in a cloud vary with the rate of cooling, the initial temperature, and the air pressure. The faster the cooling rate, the lower the initial temperature, and the lower the altitude, the greater is the number of drops and the smaller their size. The drop size spectrum also depends, to a large extent, on the number of available condensation nuclei. Furthermore, it tends to be widened by sedimentation and turbulence.

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Phase stability, thermal shock behavior and CMAS corrosion resistance of Yb2O3-Y2O3 co-stabilized zirconia thermal barrier coatings prepared by atmospheric plasma spraying

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2021.127864 ◽

2021 ◽

pp. 127864

Author(s):

Huanjie Fang ◽

Weize Wang ◽

Zining Yang ◽

Ting Yang ◽

Yihao Wang ◽

...

Keyword(s):

Corrosion Resistance ◽

Thermal Shock ◽

Thermal Barrier Coatings ◽

Phase Stability ◽

Atmospheric Plasma Spraying ◽

Atmospheric Plasma ◽

Thermal Barrier ◽

Stabilized Zirconia ◽

Barrier Coatings ◽

Thermal Shock Behavior

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

International Journal of Surface Engineering and Interdisciplinary Materials Science ◽

10.4018/ijseims.2019010103 ◽

2019 ◽

Vol 7 (1) ◽

pp. 37-54 ◽

Cited By ~ 1

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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