Microstructural evaluation of a slurry based Ni/YSZ thermal barrier coating for automotive turbocharger turbine application

Abbas, Muhammad; Uday, M. B.; Noor, Alias Mohd; Ahmad, Norhayati; Rajoo, Srithar

doi:10.1016/j.matdes.2016.07.070

Cited by 37 publications

(10 citation statements)

References 35 publications

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“…(1) Variable kinematic model was proved to be highly accurate to study multilayered FGM shell (2) Timoshenko and Reddy theories were found to be more effective than Euler's beam theory to study the effect of slenderness ratio on free vibration of FGM beams (3) Haar Wavelet approach takes less computation time to find frequencies of FGM with high accuracy (4) SSDQM has fast convergence speed in predicting natural frequencies of FGM plates (5) In order to find the longitudinal transverse frequency of FGM beams, DTEM was supposed to be preferred over DTM due to its high accuracy and fast result (6) Higher-order theories are useful in obtaining flexural and torsional frequencies of thin-and thick-walled FGM beams (7) CUF is useful to obtain various one-dimensional models (8) For efficient investigation of free vibration of FGM shells, 2D-GDQ must be used…”

Section: Fgm Panels Sobhani Aragh and Yasmentioning

confidence: 99%

“…e number of research publications has increased significantly in past two decades [5]. FGMs replace the sharp transition of properties with smooth and continuous varying properties of the material such as physical, chemical, and mechanical like Young's Modulus, Poisson's ratio, Shear Modulus, density, and coefficient of thermal expansion in a desired spatial direction [6][7][8][9] (Figure 1). e gradual changes in volume fraction of constituent and nonidentical structure at preferred direction give continuous graded properties like thermal conductivity, corrosion resistivity, specific heat, hardness, and stiffness ratio [11].…”

Section: Introductionmentioning

confidence: 99%

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Functionally Graded Materials: An Overview of Stability, Buckling, and Free Vibration Analysis

Zhang

Khan

Guo

et al. 2019

Advances in Materials Science and Engineering

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Functionally graded materials (FGMs) are novel materials whose properties change gradually with respect to their dimensions. It is the advanced development of formerly used composite materials and consists of two or more materials in order to achieve the desired properties according to the application where an FGM is used. FGMs have obtained a great attention of researchers in the past decade due to their graded properties at every single point in various dimensions. The properties of an FGM are not identical to the materials that constitute it. This paper aims to present an overview of the existing literature on stability, buckling, and free vibration analysis of FGM carried out by numerous authors in the past decade. Moreover, the analyses of mathematical models adopted for the aforementioned analyses are not the core purpose of this paper. At the end, future work is also suggested in this review paper.

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Section: Fgm Panels Sobhani Aragh and Yasmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Functionally Graded Materials: An Overview of Stability, Buckling, and Free Vibration Analysis

Zhang

Khan

Guo

et al. 2019

Advances in Materials Science and Engineering

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“…The parameters of the joining process also have an important influence on the production of a well bonded and high-quality interface. For instance, the applied pressure is a critical parameter, since it will significantly affect the accomplishment of interfacial contact between the base material surfaces [62]. At the initial stage of the joining process, plastic deformation due to the pressure applied can lead to a more intimate contact of the surfaces that promote the reduction of unbonded areas.…”

Section: Challenges In the Joining Of Metals To Ceramicsmentioning

confidence: 99%

Recent Progress in the Joining of Titanium Alloys to Ceramics

Simões

2018

Metals

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The prospect of joining titanium alloys to advanced ceramics and producing components with extraordinary and unique properties can expand the range of potential applications. This is extremely attractive in components for the automotive and aerospace industries where combining high temperature resistance, wear resistance and thermal stability with low density materials, good flowability and high oxidation resistance is likely. Therefore, a combination of distinct properties and characteristics that would not be possible through conventional production routes is expected. Due to the differences between the coefficients of thermal expansion (CTE) and Young's modulus of metals and ceramics, the most appropriate methods for such dissimilar bonding are brazing, diffusion bonding, and transient liquid phase (TLP) bonding. For the joining of titanium alloys to ceramics, brazing appears to be the most promising and cost-effective process although diffusion bonding and TLP bonding have clear advantages in the production of reliable joints. However, several challenges must be overcome to successfully produce these dissimilar joints. In this context, the purpose of this review is to point out the same challenges and the most recent advances that have been investigated to produce reliable titanium alloys and ceramic joints. for next-generation aircraft turbine engines [1][2][3][4]. Though, the development of bonding techniques especially to successfully produce dissimilar joints is the key to overcoming the poor room-temperature ductility and fracture toughness of these alloys that limit these potential applications.The possibility of combining the extraordinary properties of these titanium alloys with other materials such as nickel-based superalloys, steel, or even ceramics through dissimilar bonding can allow the development of components not only with complex geometries but also with a combination of properties exceeding the limitations of these materials when used individually.Advanced ceramics have attractive properties, such as high wear resistance, high thermal stability as well as high thermal and electrical conductivities. It is known that some of the advanced ceramics like alumina, silicon nitride, and zirconia, are also well established in the electronics, aerospace, nuclear, and automotive industries [19,20]. However, their inherent brittleness, high cost, and high hardness limit the production of large and complex shape components. The successful application of these advanced ceramics depends strongly on the joining of these materials with metals. In addition, the possibility to combine properties as high wear resistance and high thermal stability with low density, high temperature properties, and excellent creep and corrosion resistance could enable the production of more advanced components that better meet the high requirements of several industrial sectors [21].The most suitable methods for bonding metals and ceramics and producing successful joints with appreciated properties are brazing , diffusion bonding...

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“…Fonksiyonel derecelendirilmiş malzemeler, hafif, yüksek mukavemetli, ısıl direnç özellikli, aşınmaya veya korozyona karşı dayanımlı olmaları nedeni ile uzay, havacılık, endüstriyel malzemeler, biyoloji, enerji ve savunma sanayiinde kullanılmaktadır [1]. Bunlara örnek olarak, otomotiv turboşarjlar, termal bariyer kaplamalar, katı oksit yakıt hücreleri ve biyomedikal aletler verilebilir [2][3][4][5][6]. Ayrıca helisel geometri, nano ölçekten makro ölçeğe kadar mühendislik tasarımında yaygın bir kullanım alanına sahiptir.…”

Section: Introductionunclassified

Eksenel Fonksiyonel Derecelendirilmiş Helislerin Karışık Sonlu Eleman Yöntemi ile Serbest Titreşim Analizi

Ermis¹

2020

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

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Bu çalışmanın amacı, eksenel fonksiyonel derecelendirilmiş (EFD) kesin geometri tarifi üzerinden elde edilen dairesel olmayan (fıçı, hiperboloidal ve eliptik) helislerin doğal frekanslarını incelemektir. Timoshenko çubuk kuramı üstünden geliştirilen karışık sonlu eleman yönteminde kesit çarpılması da gözetilerek serbest titreşim analizi yapılmıştır. İki düğüm noktalı eğrisel sonlu elemanın her düğüm noktasındaki 12 değişken; üçü yer değiştirmeler, üçü kesit dönmeleri, üçü kuvvetler ikisi eğilme biri burulma momentleridir. Eksenel FD dairesel olmayan geometriye sahip ve kesin geometri üzerinden tariflenen helislerin serbest titreşim analizi farklı sınır koşulları ve malzeme gradyenti değişimleri üzerinden detaylıca tartışılmıştır. Yöntem literatür ya da ANSYS ile doğrulandıktan sonra literatür için tamamen özgün problemler çözülmüştür.The objective of this study is to investigate the natural frequencies of axially functionally graded (AFG) non-circular (barrel, hyperboloidal and elliptical) helices based on exact geometry. Free vibration analysis is performed using the mixed finite element method based on Timoshenko beam theory by considering cross-sectional warping effect. A two-noded curved finite element involves 12 field variables at each node, three displacements, three cross-sectional rotations, three forces, and three moments. The free vibration analysis of axially FG exact non-circular helical geometries is discussed in detail over different boundary conditions and material gradient indexes. After verifying the algorithm with the problems available in the literature and ANSYS software, original problems for the literature are solved.

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Microstructural evaluation of a slurry based Ni/YSZ thermal barrier coating for automotive turbocharger turbine application

Cited by 37 publications

References 35 publications

Functionally Graded Materials: An Overview of Stability, Buckling, and Free Vibration Analysis

Functionally Graded Materials: An Overview of Stability, Buckling, and Free Vibration Analysis

Recent Progress in the Joining of Titanium Alloys to Ceramics

Eksenel Fonksiyonel Derecelendirilmiş Helislerin Karışık Sonlu Eleman Yöntemi ile Serbest Titreşim Analizi

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