Preparation and characterization of nanostructured Al2O3-13wt.%TiO2 ceramic coatings by plasma spraying

Dong-sheng, Wang; Tian, Zongjun; Shen, Lida; Liu, Zhidong; Yin-hui, Huang

doi:10.1007/s12598-009-0090-7

Cited by 18 publications

(11 citation statements)

References 17 publications

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“…The nano powder coating consists of both fully-melted and partially-melted regions in the same spray parameters, as shown in Fig. 2b, which is identical with published literatures [8][9][10] . The nano powders particle agglomerates from many nano particles, and there are plenty of interfaces.…”

Section: Fig 1 Sem Images Of the (A) Micro Powders (B) Nano Powderssupporting

confidence: 82%

Microstructure and Wear Resistance of Al₂O₃Coatings on Functional Structure

et al. 2016

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Abstract.To enhance the wear properties of function structure, Al 2 O 3 -13%TiO 2 (AT13) coatings were plasma sprayed on 45 steel functional structure using micro and nano powders. The microstructures and phase compositions of the coatings were investigated by scanning electron microscopy and X-ray diffraction, respectively. Results show that the nano powder coating consists of fully-melted region and partially-melted region. The fully-melted regions show a lamellar structure, while the partially-melted regions retain the powders structure. The phases of coatings are Į-A1 2 O 3 and TiO 2 .The wear test was carried out on a ML-10 friction and wear tester under dry sliding condition. It is found that the wear resistance of the micro powder coating is higher than that of nano powder coating. This is mainly ascribe to the breakage of the nano powder coating resulted from low agglomerated binding force.

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Section: Fig 1 Sem Images Of the (A) Micro Powders (B) Nano Powderssupporting

confidence: 82%

Microstructure and Wear Resistance of Al₂O₃Coatings on Functional Structure

et al. 2016

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“…As a result, it was impossible to determine the stress  3 that corresponds to the stage of catastrophic failure for this type of coating. According to the investigations of Wang and Liang in [17,18], zirconium oxide coatings have a high level of fracture resistance as compared with other ceramic coatings. The largest number of acoustic emission signals (over 25) was detected for nanometric coatings.…”

Section: Resultsmentioning

confidence: 99%

Investigation of deformation behavior and fracture of ceramic coatings by the acoustic emission method

Klyatskina

Salvador

Segovia

et al. 2017

J. Mach. Manuf. Reliab.

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Abstract-The use of protective coatings on components of machines and mechanisms provides the greatest economic benefit at the lowest additional cost. Plasma spraying is one of the most productive, technologically advanced, and efficient methods of producing these coatings. The results of investigations of structures, mechanical properties, and fracture surfaces of ceramic wear resistant coatings produced by plasma spraying have been presented. DOI: 10.3103/S1052618817020078Intensive economic development and its efficiency increase are largely determined by the use of new technological processes. Advanced technologies based on major basic studies (laser, plasma, and powder metallurgy, self-propagating high-temperature synthesis, etc.) make a significant contribution to the development of special engineering.It is impossible to produce machinery and equipment for operation under extreme conditions (large dynamic loads, aggressive media, erosive and abrasive wear, etc.) is impossible without using special coatings. Special coatings are used to save high-alloy materials and to harden surfaces in order to give them special properties, such as protection from exposure to high temperatures, thermal erosion wear, neutron fluxes and radio emissions, abrasive wear, and the restoration of the geometric dimensions of the surface of worn-out details [12].The protective coating material is determined based on the conditions of its use. In the case of oxidecontaining materials (ZrO 2 -Y 2 O 3 and Al 2 O 3 -TiO 2 ), one of the main limiting factors of their use is low plasticity, as a result of which they fracture (due to cracking, delamination, or loss of material) [3].Coating strength is an important characteristic that determines the performance of products. Low strength can be caused by the physical nature of the coating structure consisting of separate relatively weakly bound particles and layers, porosities, and lack of volume coupling during the formation. Cohesive and adhesive strengths of welding regions is low as a consequence of defects in their structure. In addition, low adhesive strength is often caused by the difference in types of connections between the base material and the coating.In view of the above-mentioned, a need arises for standard special tests for the evaluation of the mechanical properties of ceramic coatings. One such method would be to use acoustic emission together with bending tests to investigate the phenomenon of the emergence of sound waves during the deformation of solids. Acoustic emissions are associated with the radiation of stress waves generated in the solid during deformation as result of discrete dynamic processes, such as the occurrence of macro-and microcracks during operation, which, as is known, are accompanied by the release of energy [4,5]. This method makes it possible to investigate the mechanisms of the fracture of materials, namely, the high sensitivity of the acoustic emission method makes it possible to determine the defectology type, which includes the size and number of...

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“…When the temperature is about 1280 °C (much lower than 7700 °C caused by arc discharge), Al 2 TiO 5 is immediately decomposed into rutile TiO 2 and α-Al 2 O 3 . Therefore, the coatings are mainly composed of TiO 2 and Al 2 O 3 [18][19][20][21] .…”

Section: Phase Compositions Of the Coatingsmentioning

confidence: 99%

Fabrication and Wear Resistance of TiO2/Al2O3 Coatings by Micro-arc Oxidation

Shen

Tao

Lin

et al. 2017

Rare Metal Materials and Engineering

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TiO2/Al2O3 composite coatings were prepared on the surface of Ti-6Al-4V alloy by micro-arc oxidation in the Na2SiO3-(NaPO3)6-NaAlO2 solution. The growth process reveals that O 2reacts rapidly with Ti 4+ (from substrate) along the reaction channels to form TiO2, and because of the addition of AlO2-, Al2O3 and Al2TiO5 are simultaneously formed. Al2TiO5 is immediately decomposed into rutile TiO2 and α-Al2O3 owing to the high thermal energy caused by discharge. Finally the prepared composite phase coatings are mainly composed of anatase TiO2, rutile TiO2 and α-Al2O3 via XRD analysis. Furthermore, the microhardness HV increases and maintains at about 11 000 MPa, and the wear resistance of the TiO2/Al2O3 composite coatings is enhanced by about 9.5 times than higher that of Ti-6Al-4V alloy owing to the existence of ceramic layer.

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Preparation and characterization of nanostructured Al2O3-13wt.%TiO2 ceramic coatings by plasma spraying

Cited by 18 publications

References 17 publications

Microstructure and Wear Resistance of Al₂O₃Coatings on Functional Structure

Microstructure and Wear Resistance of Al₂O₃Coatings on Functional Structure

Investigation of deformation behavior and fracture of ceramic coatings by the acoustic emission method

Fabrication and Wear Resistance of TiO2/Al2O3 Coatings by Micro-arc Oxidation

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Preparation and characterization of nanostructured Al2O3-13wt.%TiO2 ceramic coatings by plasma spraying

Cited by 18 publications

References 17 publications

Microstructure and Wear Resistance of Al2O3Coatings on Functional Structure

Microstructure and Wear Resistance of Al2O3Coatings on Functional Structure

Investigation of deformation behavior and fracture of ceramic coatings by the acoustic emission method

Fabrication and Wear Resistance of TiO2/Al2O3 Coatings by Micro-arc Oxidation

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Product

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Microstructure and Wear Resistance of Al₂O₃Coatings on Functional Structure

Microstructure and Wear Resistance of Al₂O₃Coatings on Functional Structure