Mechanical Behavior of Air Plasma-Sprayed YSZ Functionally Graded Mullite Coatings Investigated via Instrumented Indentation

Cojocaru, C. V.; Wang, Y.; Moreau, Christian; Lima, Rogerio S.; Mesquita‐Guimarães, J.; Garcia, Ephrahim; Miranzo, P.; Osendi, M.I.

doi:10.1007/s11666-010-9586-9

Cited by 14 publications

(4 citation statements)

References 17 publications

(8 reference statements)

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“…To overcome this limitation, an alternate method was followed. This was documented by Cojocaru et al [123], who developed a method to produce as-sprayed crystallized Mullite coatings by using high enthalpy plasma torch and low stand-off distance. This method is based on the capacity of the plasma to locally transfer a high calorific power able to increase momentarily the substrate temperature over 1000 ○ C.…”

Section: Coating Deposition By Vacuum Plasma Sprayingmentioning

confidence: 96%

Assessment of gas-surface interaction modelling for lifting body re-entry flight design

Farran¹

2018

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My wish is that the reader enjoys this dissertation and that it brings him/her a better understanding on Gas-Surface Interaction (GSI) phenomena. Nonetheless, this journey through the VKI doctoral program has been long, and I wouldn't be able to address this topic without acknowledging people that were by my side during this research, because without them this thesis would not have been possible: A big thank to Olivier Chazot for giving me the opportunity to develop my thesis in the Plasmatron facility. His office was always open and ready for discussion. A special mention to his telephone, most of the time ringing during each one of our conversations. Also to Roberto Flores, director of this thesis in UPC, who allowed me to keep in contact with my university. Following the experimental nature of this dissertation, I would like to mention also the contribution made by Pascal Collin. He did an excelent job running the Plasmatron and installing the probes. I will always remember his desperation when water leaks appear when making the vacuum in the chamber. I thank also the rest of the Plasmatron team: Bernd Helber and Damien Le Quang as radiation experts, and Işil Şakraker as advisor for calorimetric measurements. Many CFD simulations appear in this dissertaion. For that, the advice of Vincent Van Der Haegen, my office mate, has been extremely useful to achieve a converged solution. Also, the flight extrapolation technique developed here deserves my gratitude to Fabio Pinna, whose expertise in CFD helped me to improve my IXV simulations and achieve the "Pinna Certification". I really enjoyed working with them. Other VKI colleagues I want to mention are Alessandro Turchi, who helped me understand many aspects of GSI phenomena, Francesco Panerai who set the basis to develop this dissertation, and Georgios Bellas-Chatzigeordis to whom I encourage to continue with the catalytic model development and implementation in VKI numerical tools. Last but not least, special thanks to my family. They encouraged me to pursue a doctorate degree and supported me in the most difficult moments.

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Section: Coating Deposition By Vacuum Plasma Sprayingmentioning

confidence: 96%

Assessment of gas-surface interaction modelling for lifting body re-entry flight design

Farran¹

2018

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“…Cojocaru et al [182] have identified a better match between the elastic modulus, E, and hardness, H, values of the bond coat, and subsequent layers obtained from powders having similar type and size distribution. Das et al [183] have plasma sprayed a mixture of zircon and alumina on a mild steel substrate.…”

Section: Zirconiamentioning

confidence: 99%

D.C. Plasma Spraying

Fauchais

Heberlein

Boulos

2013

Thermal Spray Fundamentals

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“…It is thought that by arranging the smooth change of the mismatch between the thermal expansion coefficients of the composition, the delamination within the FGC structure could be addressed. Other FGCs manufactured using this technique are HAp/TiO 2 , Yttria stabilized zirconia (YSZ)/mullite coats deposited on SiC substrates [53] and tungsten carbide/cobalt (WC/Co) FGC [54].…”

Section: Thermal Sprayingmentioning

confidence: 99%

Advances in Functionally Graded Ceramics – Processing, Sintering Properties and Applications

Besisa¹,

Ewais²

2016

Advances in Functionally Graded Materials and Structures

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In multilayered structures, sharp interface is formed between the layers of dissimilar materials. "t this interface, the large difference in thermal expansion coefficients of the two dissimilar materials generates residual thermal stresses during subsequent cooling. These stresses lead to cracking at the interface, and these cracks lead to the deterioration of mechanical properties, and finally crack propagation leads to the delamination of the multilayered structure. Scientific progress in the field of material technology, and the continuing developments of modern industries have given rise to the continual demand for ever more advanced materials with the necessary properties and qualities. The need for advanced materials with specific properties has brought about the gradual transformation of materials from their basic states monolithic to composites. Recent advances in engineering and the processing of materials have led to a new class of graded multilayered materials called Functionally Graded Materials FGMs . These materials represent a second generation of composites and have been designed to achieve superior levels of performance. This chapter looks at the best processing technologies and the uses and applications of the advanced, high quality products generated, and also presents an extensive review of the recent novel advances in Functionally Graded Ceramics FGCs , their processing, properties and applications. The manufacturing techniques involved in this work have involved many concepts from the gradation, consolidation and different sintering processes. Each technique, however, has its own characteristics and disadvantages. In addition, the FGC concept can be applied to almost all material fields. This chapter covers all the existing and potential application fields of FGCs, such as engineering applications in cutting tools, machine parts, and engine components, and discusses properties of FGCs such as heat, wear, and corrosion resistance plus toughness, and their machinability into aerospace and energy applications.

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Mechanical Behavior of Air Plasma-Sprayed YSZ Functionally Graded Mullite Coatings Investigated via Instrumented Indentation

Cited by 14 publications

References 17 publications

Assessment of gas-surface interaction modelling for lifting body re-entry flight design

Assessment of gas-surface interaction modelling for lifting body re-entry flight design

D.C. Plasma Spraying

Advances in Functionally Graded Ceramics – Processing, Sintering Properties and Applications

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