Wear Mechanisms of Toughened Zirconias

Becker, P. C.; Libsch, T. A.; Rhee, S. K.

doi:10.1002/9780470320280.ch55

Cited by 6 publications

(3 citation statements)

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“…Perspective materials for use in hard loaded friction units of nuclear power facilities are the transformational hardened ceramic materials [2,3] which often work together with metal. Processes of carrying over of metal and its oxides on a ceramics surface take place in a metalceramics pair, therefore the socalled transfer layer is formed which carries out protective function, increasing ceramics wear resistance [4].…”

Section: Introductionmentioning

confidence: 99%

Facility and Researches Results of the Frictional Characteristics of Metal – Irradiated-Ceramics Pair

Butenko¹,

Dubniuk²,

Dyachenko³

et al. 2022

Problems of Atomic Science and Technology

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The technique and facility for studying of frictional characteristics of metal – ceramics pair are presented. Parameters of samples irradiation on the helium ions linear accelerator with 0.12 and 4 MeV energies are resulted. Samples from TiO2 and Al2O3 at 0.12 MeV beam energy are irradiated. Damageability and occurrence profiles of target atoms along of helium ions range as sputtering ratios are calculated for the irradiated materials. Dependences of the sputtered atoms quantity on samples depth are resulted. Using this data, calculations on change of samples "superficial" density along of ions range are made. Experimental results of a sliding friction factor measurement depending on cycle’s quantity, temperature and irradiation dose are presented. On the basis of microscopic researches conclusions on influence of an irradiation on frictional characteristics of a metal – ceramics pair are drawn.

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Section: Introductionmentioning

confidence: 99%

Facility and Researches Results of the Frictional Characteristics of Metal – Irradiated-Ceramics Pair

Butenko¹,

Dubniuk²,

Dyachenko³

et al. 2022

Problems of Atomic Science and Technology

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show abstract

“…Perspective materials for use in the loaded friction units of nuclear power facilities are the transformational hardened ceramic materials [2,3] which often work together with metal. Transfer of a metal and its oxides on a ceramics surface carries out protective function, increasing its endurance [4].…”

Section: Introductionmentioning

confidence: 99%

Tribological Characteristics of ‘Steel – Ceramics-Irradiated-by-Helium-Ions’ Pair

Butenko¹,

Dubniuk²,

Dyachenko³

et al. 2021

Problems of Atomic Science and Technology

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Facility for the tribological characteristics studying of a metal – ceramics pair and parameters of ceramic samples irradiation on the helium ions linear accelerator with energies 0.12 and 4 MeV are resulted. Profiles of damageability and occurrence of target atoms along of helium ions range are calculated for the irradiated TiO2 and Al2O3. Sputtering ratios and dependence of the sputtered atoms quantity on samples thickness are received. Calculations on density change of the irradiated samples are made. Experimental results of a sliding friction factor measurement depending on cycle’s quantity, temperature and irradiation doses are presented. On the basis of microscopic researches and calculation data conclusions are drawn about irradiation influence on interacting pair’s tribological characteristics.

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“…It is common to discuss the 100% tetragonal Y-TZP wear against a steel counter body in a sliding speed range of 0.2-0.9 m/s in terms of microcutting by ceramic wear particles detached from the sample under the action of the stress exerted by the volume expansion effect of strain-induced martensitic transformation [8,9]. Such a wear process may be referred to as mild wearing contrast to the brittle fracture that occurs at higher speeds when strain-induced plasticity is not effective.…”

Section: Introductionmentioning

confidence: 99%

Acoustic emission characterization of sliding wear under condition of direct and inverse transformations in low-temperature degradation aged Y-TZP and Y-TZP-AL2O3

et al. 2018

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In this research, results of the investigation of the sliding friction and wear of yttria-stabilized tetragonal zirconia polycrystalline (Y-TZP) and Y-TZP-Al 2 O 3 samples preliminarily subjected to low-temperature degradation are reported. The investigation was carried out using a pin-on-disk tribometer with simultaneous recording of acoustic emission (AE) and vibration acceleration. The sliding wear process was found to be determined by dynamic direct and inverse Y-TZP transformations detected by monoclinic and tetragonal X-ray diffraction peak ratios. The AE signals generated under direct and inverse transformations can be used to characterize wear and friction mechanisms as well as direct and inversed sliding-induced phase transformations. The AE signal energy grows with the friction coefficient and the inverse transformation degree. Reduction of the AE signal energy indicates establishing the mild wear stage caused by effective stress-induced direct martensitic transformation. The AE signal median frequency increases in the case of lower friction. Numerical studies of wear subsurface fracture under conditions of stress-induced martensitic transformation were used to elucidate the role played by the phase transformation in Y-TZP and Y-TZP-Al 2 O 3. Martensitic transformation in Y-TZP was described with use of the non-associated dilatant plasticity model. Simulation results particularly show that increase in the value of dilatancy coefficient from 0 to 0.2 is accompanied by 25%−30% reduce in characteristic length and penetration depth of sliding-induced subsurface cracks. As shown the AE may be an effective tool for in-situ monitoring the subsurface wear of materials experiencing both direct and inverse transformations.

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Wear Mechanisms of Toughened Zirconias

Cited by 6 publications

References 0 publications

Facility and Researches Results of the Frictional Characteristics of Metal – Irradiated-Ceramics Pair

Facility and Researches Results of the Frictional Characteristics of Metal – Irradiated-Ceramics Pair

Tribological Characteristics of ‘Steel – Ceramics-Irradiated-by-Helium-Ions’ Pair

Acoustic emission characterization of sliding wear under condition of direct and inverse transformations in low-temperature degradation aged Y-TZP and Y-TZP-AL2O3

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