An indentation model for erosive wear in Al2O3/SiC nanocomposites

Shapiro, I.; Todd, Richard I.; Titchmarsh, J.M.; Roberts, Steve

doi:10.1016/j.jeurceramsoc.2010.07.038

Cited by 7 publications

(6 citation statements)

References 19 publications

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“…According to Table 3 AO13Al ceramics have the highest fracture toughness, while AO25Al has the worst one. It is worth mentioning that the data on the material loss from this work is in the good agreement with that from [14], where at 4,9 N load and 22,5 m spacing the volume of 23, 5 ⋅ 10 3 m 3 is chipped away from the surface of alumina ceramics.…”

Section: Resultssupporting

confidence: 83%

“…Figure 2 presents the change of the surface with the variation of array spacing parameters: (a, c)-elastic-plastic deformation and (b)-additional material lost. Relating to [14] the impression volume was taken into account. That is why the decrease of the spacing from 50 down to 0 m led to three characteristic stages of the qualitative change of the macrodamage of the surface: (V 1 )-the array, consisting of 9 separate indents (in some cases there were cracks, stretching from the corners of the indent) (Figure 2(a)); (V 2 )-chipping of the material due to the intersection of the cracks and/or the internal stress regions (Figure 2(b)); (V 3 )-a single impression, after the consequent penetration of the indenter for 9 times on the same point of the surface (Figure 2(c)).…”

Section: Resultsmentioning

confidence: 99%

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Influence of the Dopants on the Mechanical Properties of Alumina-Based Ceramics

Kaygorodov

Krutikov

Paranin

2013

Journal of Ceramics

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In the present study the mechanical properties of dense alumina-based ceramics obtained by two processing routes are investigated. The application of magnetic-pulsed compaction or hot pressing of the powder leads to a comparable combination of microhardness, elastic modulus, and fracture toughness. The insertion of Al into Al 2 O 3 powder increases the microdistortions of the crystalline lattice, resulting in the sufficient decrease of indentation wear-resistance. The usage of ZrO 2 or TiCN as dopants to alumina matrix improves slightly the mechanics of the composites with a noticeable decrease of the material lost by 30% compared to pure alumina at closely spaced arrays of indents. Regardless of the synthesis method, the ceramic grains were formed completely with the fracture travelling along the grain boundaries.

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Section: Resultssupporting

confidence: 83%

Section: Resultsmentioning

confidence: 99%

Influence of the Dopants on the Mechanical Properties of Alumina-Based Ceramics

Kaygorodov

Krutikov

Paranin

2013

Journal of Ceramics

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“…Another limitation of this approach may be related to materials’ lower hardness due to residual porosity and occurred flaws dealt with nanotubes agglomeration at ceramic processing 212 . An addition of SiC grains promoted the toughening of alumina ceramics and their erosion resistance, specifically changing from intergranular fracture for monophase ceramics to transgranular fracture for the composites 213–215 . However, again these materials’ processing requires firing in controlled atmosphere.…”

Section: Features Of Erosion Of Advanced Ceramics and Coatings And Ro...mentioning

confidence: 99%

Advanced ceramics and coatings for erosion‐related applications in mineral and oil and gas production: A technical review

Medvedovski¹

2022

Int J Applied Ceramic Tech

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The applications of advanced ceramics, composites and coatings in mineral, mining, fuel production, and processing are reviewed. The materials include oxide and non‐oxide ceramics (specifically SiC‐based), ceramic–ceramic, and ceramic–metal composites, coatings on metallic components where functional application properties can be achieved. Some principles of materials selection, specifically for erosion wear and corrosion applications, and manufacturing are considered. The examples of the successful development and processing of ceramics, coatings, and composites with manageable structures and phase compositions, in the erosion‐related applications, particularly conducted by the author, are discussed and reviewed. Specifically, industrially employed types of ceramics and processing routes were focused on the considered applications. Particular demands for advanced materials with high reliability and complex shapes or for protective coatings on complex shape steel components and long tubing with inner surface protection require novel and optimized processing. The factors affecting erosion and erosion–corrosion resistance and the paths for the erosion resistance enhancement of ceramic and coating materials are considered. Ceramic components design, technology, and installation features are reviewed.

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“…The sample with 0.8 wt% Tb 4 O 7 sintered at 1625°C exhibited the best performance, with the relative density of 95.70% and the abrasion rate of 0.103. IP Shapiro and others formed nanocomposites by adding submicrometer‐sized SiC particles in an alumina matrix, and found that the ceramic wear resistance increased and its fracture mode changed from intergranular fracture to intergranular fracture. Subsequently, Yahya and Todd discovered the same fracture mode as SiC‐doped alumina ceramics by continuously exploring the wear behavior of alumina ceramics doped with small amounts of C.…”

Section: Introductionmentioning

confidence: 99%

Effect of different contents of zirconia and yttrium oxide on microstructure and properties of high alumina ceramics

Huang

Zhang

et al. 2019

Int J Applied Ceramic Tech

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The effects of zirconia and yttrium oxide addition on microstructure, bulk density, microhardness, flexural strength, and wear resistance of high alumina ceramics (>97 wt% Al 2 O 3 , MSA ceramics) composed of MgO-SiO 2 -Al 2 O 3 system have been investigated. The results show that the addition of zirconia makes the mechanical properties and wear properties of ceramics composed of MgO-SiO 2 -Al 2 O 3 -ZrO 2 (MSAZ ceramics) system have been greatly improved compared with MSA ceramics. In addition, the ceramics composed of MgO-SiO 2 -Al 2 O 3 -ZrO 2 -Y 2 O 3 (MSAZY ceramics) system have better mechanical properties and wear properties than MSAZ ceramics. With the contents of zirconia and yttrium oxide increase, the bulk density, microhardness, and flexural strength of MSAZ and MSAZY ceramics increased at first and then decreased. However, the wear rate shows the opposite. When 0.4 wt% ZrO 2 and 0.6 wt% Y 2 O 3 were added to the matrix, the wear rate of MSAZY ceramics reached a minimum of 0.042%, and the wear resistance was improved by about 73.8% compared with MSA ceramics with a wear rate of 0.16%. In addition, the optimum additions of zirconia and yttria are 0.4% and 0.6%, respectively. K E Y W O R D S ceramic matrix composites, mechanical properties, MgO-SiO 2 -Al 2 O 3 system, wear rate

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An indentation model for erosive wear in Al2O3/SiC nanocomposites

Cited by 7 publications

References 19 publications

Influence of the Dopants on the Mechanical Properties of Alumina-Based Ceramics

Influence of the Dopants on the Mechanical Properties of Alumina-Based Ceramics

Advanced ceramics and coatings for erosion‐related applications in mineral and oil and gas production: A technical review

Effect of different contents of zirconia and yttrium oxide on microstructure and properties of high alumina ceramics

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