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Dissertations / Theses on the topic 'Intermetallic Coatings'

Author: Grafiati
Published: 6 September 2023

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1

Hearley, J. A. "The corrosion behaviour of high velocity oxy-fuel NiAl intermetallic coatings." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.603927.

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This thesis is a contribution to research into the corrosion behaviour of high velocity oxy-fuel (HVOF) thermally sprayed NiAl coatings. Investigations initially concentrated on the spraying of intermetallic compounds (IMCs), in particular NiAl. Results showed that NiAl could be successfully deposited as an IMC onto a 2.25Cr-1Mo substrate to produce a high quality coating of low porosity and excellent adhesion. The feasibility of using lower cost, less corrosion resistant substrates with a high performance protective coating offers the possibility of enhanced cost effectiveness allied with inc
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2

OSTROVSKAYA, OXANA. "Oxidation resistance of Ti-Al intermetallic alloys and protection by ceramic coating." Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2705474.

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In recent years, TiAl intermetallic alloys been widely used in aircraft and automotive industry. With the aim of improving the mechanical behavior and the oxidation resistance at high temperature of the TiAl alloys firstly designed, new intermetallic alloys of second and third generation have been successively developed. In this work, the oxidation resistance in air of four intermetallic alloys of second generation (Ti-48Al-2Cr-2Nb) and third generation ( Ti-48Al-2Nb-0.7Cr-0.3Si, Ti43.5Al-4Nb-1Mo and Ti-47Al-2Cr-8Nb) was investigated by TGA equipment under isothermal conditions in the range
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3

Wang, Zhiqi. "Study of Ti-Al-Cr oxidation resistant coatings for γ-TiAl based intermetallic alloys". Thesis, University of Surrey, 2002. http://epubs.surrey.ac.uk/844155/.

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Magnetron sputter deposition with single target materials was used to produce amorphous and crystalline Ti-A1-(Cr) alloy coatings on a Ti-50Al substrate. The following coatings were studied: Ti-50Al-10Cr, Ti-53Al-15Cr, Ti-50Al-20Cr and Ti-48Al. The microstructures of the coatings were studied in the as deposited condition and after devitrification and heat treatment. A random distribution of nano-precipitates was formed in amorphous as-deposited coatings. Columnar features were present when the as-received deposit had crystallised during sputter deposition. If crystallization occurred during d
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4

Stuttle, Christopher. "The electrodeposition of tin coatings from deep eutectic solvents and their subsequent whisker growth." Thesis, Loughborough University, 2014. https://dspace.lboro.ac.uk/2134/17961.

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Tin electrodeposits produced from aqueous electrolytes are frequently used within the electronics industry due to their high solderability and corrosion protection. One limitation to using these deposits is their spontaneous formation of long conductive filament whiskers. These whiskers grow post-electrodeposition and increase the risk of unwanted electrical shorts within electronic devices. In this thesis, tin electrodeposits produced from a proprietary bright acid Tinmac electrolyte, currently used in industry, were studied. Electrodeposits were produced using a range of current densities wi
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5

Jain, Syadwad. "Corrosion and protection of heterogeneous cast Al-Si (356) and Al-Si-Cu-Fe (380) alloys by chromate and cerium inhibitors." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1145140821.

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6

Cinca, i. Luis Núria. "Study of the structure-properties relationship of Fe-Al, Nb-Al and Ni-Ti intermetallic coatings obtained by thermal spray technologies." Doctoral thesis, Universitat de Barcelona, 2008. http://hdl.handle.net/10803/1078.

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Due to the current interest on intermetallic compounds (IMCs), specially for their use at high temperatures being capable to substitute superalloys and, for the lately improvement of their lack of ductility, this work evaluates the use of intermetallics as coatings by using Thermal Spray technologies, thus providing improved surface component properties. <br/>The IMCs chosen for this study have been the following: FeAl, NiTi and NbAl3. Regarding their high Al contents, the aluminides present low densities and the possibility to form protective alumina compact layers against hostile environment
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7

ETT, GERHARD. "Estudo eletroquimico da co-reducao de KBFsub4 e Ksub2 TIFsub6 em meio de uma mistura eutetica de LiF-NaF-KF para a obtencao do diboreto de titanio [TIB sub 2]." reponame:Repositório Institucional do IPEN, 1999. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10772.

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Made available in DSpace on 2014-10-09T12:43:50Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:10:02Z (GMT). No. of bitstreams: 1 06778.pdf: 10838321 bytes, checksum: da09e815b4eb68ff38370a4f1987faaa (MD5)<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
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8

Fukátková, Pavla. "Zkřehnutí TiAl intermetalik indukované oxidací povrchu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-228935.

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This work aimed to study the effect of surface oxidation of TiAl intermetallic alloys, its fracture behavior and study the formation and stability of picked coatings that could prevent these phenomena. ?-TiAl alloy (Ti46Al7Nb) was examined by three different coatings (AlCr, AlCrN and AlCrNAg). Firstly, it was carried out short-term exposure to high temperature in an inert atmosphere for all coatings. Secondly, there were experiments of cyclic exposure to high temperature in normal atmosphere and isothermal high-temperature exposure in a normal atmosphere. During high-temperature experiments in
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9

Roberts, Tracey. "The structure and stability of high temperature intermetallic phases for application within coating systems." Thesis, Cranfield University, 2009. http://dspace.lib.cranfield.ac.uk/handle/1826/4499.

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The reduction of noise and emissions is becoming increasingly important in civil aircraft jet engines as well as requirements for reduced fuel consumption and improved efficiency. This has resulted in the drive towards increasing turbine entry temperatures and the development of thermal barrier coatings (TBCs). Due to the effectiveness of the platinum-modified nickel aluminides currently used as bond coat layers for Ni-based superalloy TBCs, higher temperature ruthenium-containing bond coat layers are being examined as a possible low cost alternative to platinum. Rolls Royce have a patented pr
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10

Geers, Christine [Verfasser]. "Inhibition of coking and metal dusting on conventional alloys by using a nickel-tin intermetallic coating / Christine Geers." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2013. http://d-nb.info/1033988405/34.

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11

Horák, Karel. "Tepelná a mechanická odolnost zinkového povlaku." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228774.

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The work is aimed at studying the thermal degradation of the protective zinc coating. Its large part deals with the structure of the various stages of transition and their arrangement, the main emphasis is on analysis of brittle intermetallic phases, which arise due to increased temperature. Conclusion of the work is trying to clear itself causes degradation of this protective layer.
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12

Ledieu, Julian. "The five-fold surface of the icosahedral Al←7←0Pd←2←1Mn←9 quasicrystal." Thesis, University of Liverpool, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343756.

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13

Lima, Graziela de. "influência da adição de diferentes concentrações de bismuto, níquel, estanho e alumínio sobre a espessura de camada, resistência à corrosão e brilho nos revestimentos galvanizados." Universidade do Estado de Santa Catarina, 2007. http://tede.udesc.br/handle/handle/1716.

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Made available in DSpace on 2016-12-08T17:19:30Z (GMT). No. of bitstreams: 1 elementos pre-textuaus.pdf: 86552 bytes, checksum: b4f9afc7367b0456da6227d06b49d099 (MD5) Previous issue date: 2007-06-29<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Blackeart malleable iron samples were galvanized using twenty different zinc bath compositions. Each bath was made with different concentration and combinations of bismuth, nickel, tin and aluminium. These additions aim not only to substitute lead, a hazardous element to the environment, but also to reduce coating thickness, usuall
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14

D'Ans, Pierre. "Contribution à la mise au point d'une démarche rationnelle de sélection des traitements de surface: illustration dans le cas des dispositifs de fonderie de l'aluminium." Doctoral thesis, Universite Libre de Bruxelles, 2009. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210366.

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Sélectionner des traitements de surface pour l’industrie nécessite de prendre en compte :les propriétés à conférer au substrat, la nature et la géométrie de celui-ci et les caractéristiques du milieu extérieur. Certaines combinaisons de ces paramètres rendent difficile la sélection d’un traitement unique, d’où le recours à des multitraitements de surface. Dès lors, se posent les questions suivantes :<p>- Utiliser des multitraitements de surface peut se faire en scindant les différentes requêtes en sous-ensembles, de manière à ce que chaque traitement réponde à l’un d’eux. Dans quel ordre ces r
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15

Baloyi, Nkele Martha. "Titanium-Zirconium-Niobium intermetallic composite coatings for orthopaedic applications." 2014. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001501.

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M. Tech. Metallurgical Engineering<br>Ti6Al4V alloy is the leading material for hip replacement because of its biocompatibility, elastic modulus and good yield strength, but shows poor corrosion and wear properties in simulated body fluid. Thin coatings were fabricated on Ti6Al4V alloy using Zirconium, Niobium and Titanium reinforcements with the aid of Nd:YAG Rofin Sinar laser system. Niobium reinforcement produced the best coating that displayed the best corrosion resistance and percentage increase in wear resistance in simulated body fluid as compared to the substrate. Therefore, this coati
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16

Sidharada, D. R. K. "Synthesis and Characterization of Intermetallic Coatings by Laser Cladding and Novel Ball Milling Approach." Thesis, 2014. http://etd.iisc.ac.in/handle/2005/4103.

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The aim of the present work is to engineer a new kind of coating material with superior quality and reliability in a cost effective way by laser cladding and ball milling process. Non equilibrium processing methods were adopted to produce different combination of phases, which are complicated, or cannot be produced by traditional fabrication processes. Advanced characterization techniques were utilized, to understand the mechanism of phase formation and the science behind our observations, thereby providing effective inputs for enhancement of outcomes. The present work deals with the alloy
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17

Yu, Chang-He, and 余昌和. "Physical Vapor Deposited Nickel Aluminide Intermetallic Alloy Coatings and Their Cyclic Oxidation Resistance." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/71720995442160873370.

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碩士<br>逢甲大學<br>材料科學學系<br>89<br>Thermal barrier coatings (TBCs) has been well developed to help protecting against high temperature oxidation, meanwhile applying an intermediate bond coat, typically of an MCrAlY-type metal alloy for further cyclic oxidation resistance enhancement. In previous study, demonstrating the improvement on the cyclic oxidation resistance of steel using a novel process-cathodic arc ion plated nickel aluminide. Thus, cathodic arc, electron-beam evaporation and sputter ion plated were used to deposit nickel aluminide films on nickel-based superalloy as well as stainless st
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18

Mokgalaka, Mokgadi Nomsa. "Laser deposition of titanium and nickel intermetallic coatings on titanium for aerospace applications." 2014. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1001525.

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M. Tech. Metallurgical Engineering<br>Titanium alloys exhibit poor tribological characteristic which include abrasion resistance, metal to metal wear resistance and solid particle erosion and cavitation due to low surface hardness and high coefficient of friction. These poor properties have limited the application of titanium alloys as engineering tribological components, tools and parts that operate in severe wear and friction conditions. Laser processing defects such as pores, cracks and segregation pose a huge threat to the quality and the microstructure of the deposited layer. Defects caus
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