Microstructural influence in slurry erosion of ceramics

Lathabai, Srinivasarao; Pender, D.C

doi:10.1016/0043-1648(95)06679-9

Cited by 51 publications

(18 citation statements)

References 23 publications

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“…1). Degradation of materials due to slurry erosion depends on many factors, which can be divided onto three main groups: the first one connected with fluid flow conditions (flow velocity, angle of particle impingement, particles concentration, liquid density, liquid chemical activity, liquid temperature), the second one connected with solid particles (size, shape, hardness, strength) and the third one connected with target material (mechanical and endurance properties: toughness, fatigue, yield and ultimate strengths, work hardening, surface topography, microstructure, number and size of defects) [3,6,[9][10][11][12]. Thus, the numbers of factors influencing slurry erosion is very big and the degradation of materials is a synergic effect of all mentioned factors.…”

Section: Slurry Erosion Phenomenonmentioning

confidence: 99%

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Slurry Erosion – Design of Test Devices

Buszko

Krella

2017

Advances in Materials Science

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Degradation of material caused by impacts of a solid particle (erodent) suspended in a liquid is called slurry erosion and is a major problem in the hydropower and maritime industry. Slurry erosion depends on many factors, e.g. liquid and erodent velocity, size, shape, angle of impact, hardness and number of erodents, and strength of a target material. The various types of test devices have been designed to investigate an effect of mentioned parameters on material resistance. In the paper are described main types of the test apparatus showing their main advantages and disadvantages. Some results of slurry erosion resistance of few groups of materials are also presented.

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Section: Slurry Erosion Phenomenonmentioning

confidence: 99%

“…In contrast to jet type, this test device is easier to use, manufacture and very cheap. A big advantage of this type of test device is the ability to quickly conduct simultaneously tests of four specimens of different materials in compare to other test rigs with this same erosion intensity [12,54]. …”

Section: Slurry Potmentioning

confidence: 99%

Slurry Erosion – Design of Test Devices

Buszko

Krella

2017

Advances in Materials Science

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“…Therefore, the nozzle is the most critical component in CWS atomizing and burning system, and the nozzle wear directly influences the application and economics of the CWS. There are many factors that influence the CWS nozzle wear, such as: nozzle materials and its geometry, the erodent abrasive geometry, the mass flow and the environmental temperature [4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Wear surface studies on coal water slurry nozzles in industrial boilers

Ding

Deng

2007

Materials & Design

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“…It was reported that the depletion of materials such as metals and alloys was produced by the micro-cutting and microploughing of strong particles for ductile materials. The crack coalescence results in the removal of large-scale components for brittle materials.Material degradation by the dint of slurry erosion relies on myriad variables that can be classified into three primary groups: the first one associated with fluid flow circumstances (flow speed, particle impingement angle, concentration of particles, density of liquid, liquid chemical activity, temperature of liuid), the second is linked to solid particles ( their size, hardness, shape, strength) and the third is related to the target material (mechanical and endurance characteristics: toughness, fatigue, number and size of defects, yield and ultimate strength, topography of the surface and microstructure) [26][27][28][29][30][31]. Impact speed and large particle size affect a single particle's kinetic impact energy.…”

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confidence: 99%

Laser cladding technique for erosive wear applications: a review

Singh

Goyal

Kumar

et al. 2020

Mater. Res. Express

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Slurry erosion is a serious menace in most of the hydro machine components all around the globe. Slurry erosion is accountable for heavy economic losses. However, some counter measures are being taken to mitigate the effect of sand particles passing through hydro-machine parts and research is also underway to improve the component surface by applying different surface coatings. Laser cladding is a surface deposition process that is used to achieve very good metallurgical bonding with minimum porosity as compared to other surface coating techniques. In this research paper, an attempt has been made to compile the literature related to laser cladding technology, its applications, process parameters, coating materials and their effectiveness to bestow solutions to various types of surface degradation with special emphasis on slurry erosion problems. This paper will serve as a reference for the researchers working in the area of slurry erosion prevention.Erosion is described as wear induced by solid particles hitting a surface, transferred via a gas flow or entertained in a fluid streaming medium [16]. The impinging angle of the particles and relative velocity determines the abrasive wear on a surface [17]. Hydro abrasive erosion depends upon several parameters such as size of sand, hardness, concentration, shape, quantity, and velocity, in most cases minimizing the impact energy of the particles by monitoring the parameters mentioned or indirectly. Despite this, enormous surface destruction to hydroelectric devices and structures occurs at any stage at a sufficiently elevated velocity, causing scratching and removal of material [18]. It has been learned that because of their excellent corrosion characteristics and acceptable resistance to strong particle erosion, in hydroelectric power plants stainless steels are widely used [16]. Bitter [19] suggested two erosion wear theories: cutting and deformation, according to him, the cutting wear is triggered by the particle velocity element parallel to the target surface, whereas the deformation wear is accountable for the normal component of the velocity. Some researchers [20-24] indicated that hardness of the target material or hardness of the impacting solid particles was dominant for wear of target surface. Wang and Yang [25] noted that a dominant function in the erosion process is the surface hardening of metals. The worn surfaces were analysed by scanning electron microscope and different wear processes such as micro-ploughing, lip formation, platelet, tiny indentation craters, and micro-cracking were described. It was reported that the depletion of materials such as metals and alloys was produced by the micro-cutting and microploughing of strong particles for ductile materials. The crack coalescence results in the removal of large-scale components for brittle materials.Material degradation by the dint of slurry erosion relies on myriad variables that can be classified into three primary groups: the first one associated with fluid flow circumstances (flow speed, partic...

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Microstructural influence in slurry erosion of ceramics

Cited by 51 publications

References 23 publications

Slurry Erosion – Design of Test Devices

Slurry Erosion – Design of Test Devices

Wear surface studies on coal water slurry nozzles in industrial boilers

Laser cladding technique for erosive wear applications: a review

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