Atmospheric Plasma Deposition of SiO2 Films for Adhesion Promoting Layers on Titanium

Kotte, Liliana; Haag, Jana; Mertens, Tobias; Kaskel, Stefan

doi:10.3390/met4040639

Cited by 10 publications

(8 citation statements)

References 5 publications

(8 reference statements)

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“…It has been observed that the evolution trend of the information entropy corresponds to crack length trend, as reported by Kotte et.al. [14], where the aging behavior of the titanium alloys is microscopically investigated. The first method does not require the summation operation that is needed in the second method.…”

Section: Figurementioning

confidence: 99%

Acoustic emission entropy as a measure of damage in materials

Kahirdeh¹,

Sauerbrunn²,

Modarres³

2016

AIP Conference Proceedings

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Abstract. In this paper, we propose the information entropy of acoustic emission (AE) signatures as an index for assessment of degradation in materials. This is a new method for health monitoring of materials and structures that relies on the estimation of the information entropy from the AE signals detected, for example from cyclic fatigue loading of the materials. Different ways of calculation of the information entropy from AE signals are explored and discussed in this paper. As an example of the materials degradation, this study investigates the behavior of maximum entropy ( ) at the time of the materials' failure using a series of fatigue cracking tests on titanium alloy, a material commonly used in certain aircraft structures. This paper describes the fatigue tests in which AE waves and features were measured and discusses the various approaches to estimate the information entropy corresponding to the detected AE. The results show that fatigue failure occurs at the same maximum entropy value regardless of the trajectory of the fatigue crack growth and loading conditions that caused the fatigue.

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Section: Figurementioning

confidence: 99%

Acoustic emission entropy as a measure of damage in materials

Kahirdeh¹,

Sauerbrunn²,

Modarres³

2016

AIP Conference Proceedings

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“…Currently wet chemical processes such as NaTESi, which are partially based on toxic and environmentally hazardous compounds, are used for the pre‐treatment of titanium. An alternative to these wet chemical methods is the deposition of silicone dioxide films using the LARGE plasma at AP when epoxy resin adhesives are used , …”

Section: Resultsmentioning

confidence: 99%

“…For PECVD, plasma‐chemical etching, or plasma spraying process, mostly a remote feeding system is installed in front of the plasma source. With such as system, an etching gas or a powder is easily added into the afterglow plasma without contaminating the plasma source.…”

Section: Methodsmentioning

confidence: 99%

Extended DC arc atmospheric pressure plasma source for large scale surface cleaning and functionalization

Kotte

Mäder

Roch

et al. 2018

Contributions to Plasma Physics

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Plasma technologies at atmospheric pressure (AP) promise efficient integration into industrial manufacturing technology and save considerable investment and maintenance costs. The development of new fields of application of AP techniques increasingly requires the provision of adapted, large‐area plasma sources. The linearly extended direct current (DC) arc plasma source, long arc generator principle (LARGE) for short, with a working width of up to 350 mm was developed at the Fraunhofer IWS for the large area plasma surface treatment. In contrast to other jet‐based AP sources arrays, the LARGE plasma source has a very long afterglow flame length, which makes it possible to efficiently treat surfaces over the range ±40 mm. Especially for large‐area plasma applications, commercial jet nozzle arrays are very complex to control and require more than one power generators which increases the equipment cost. In this paper we discuss selected application fields, namely the rapid (up to 50 m/min) removal of oil films on aluminium sheets, the large‐area functionalization (removal of release agents) of carbon‐fibre reinforced plastic (CFRP) materials, and the deposition of SiO2 adhesive layers on titanium to improve adhesion in the structural bonding of these materials.

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“…The remaining three papers are more application focussed with the work by Kotte [11] addressing the requirement for titanium alloys to be used as joining parts to light weight materials, such as aluminium and fibre reinforced plastics in the aerospace industry, whereas the work by Han [12] and a review paper by Petersen [13] relate to critical requirements in medical-based applications. Both papers are informative regarding the use of titanium alloys for orthopaedic and dental implant applications, featuring up to date issues and offering potential future solutions.…”

Section: Open Accessmentioning

confidence: 99%

Titanium Alloys

Whittaker

2015

Metals

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Although originally discovered in the 18th century [1], the titanium industry did not experience any significant advancement until the middle of the 20th century through the development of the gas turbine engine [2]. Since then, the aerospace sector has dominated worldwide titanium use with applications in both engines and airframe structures [3]. The highly desirable combination of properties, which include excellent corrosion resistance, favourable strength to weight ratios, and an impressive resistance to fatigue, has led to an extensive range of applications [4], with only high extraction and processing costs still restricting further implementation.Whilst the aerospace industry faces challenges related to increasing operating temperatures and to fully utilise polymer-based composites in future designs [5], innovative solutions, including metal matrix composites and titanium aluminides, provide pathways for future development. Furthermore, improvements in extractive metallurgy and processing methods have made titanium-based alloys more accessible to alternative industrial sectors. Industries currently utilising these materials include sports, biomedical, and marine sectors [6].As more traditional applications are supplemented by exciting new opportunities, it is clear that extensive research opportunities are likely to exist in the titanium industry for the foreseeable future.

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Atmospheric Plasma Deposition of SiO2 Films for Adhesion Promoting Layers on Titanium

Cited by 10 publications

References 5 publications

Acoustic emission entropy as a measure of damage in materials

Acoustic emission entropy as a measure of damage in materials

Extended DC arc atmospheric pressure plasma source for large scale surface cleaning and functionalization

Titanium Alloys

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