Nano- and micro-scale impact testing of zirconia, alumina and zirconia-alumina duplex optical coatings on glass

Beake, Ben D.; Isern, Luis; Bhattacharyya, D. P.; Endrino, José L.; Lawson, K.J.; Walker, Trevor

doi:10.1016/j.wear.2020.203499

Cited by 4 publications

(8 citation statements)

References 22 publications

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“…However, it should also be notated that influences other than material-related parameters might be responsible for the best performance, such as the shape and design of the instrument, the cross-sectional area, and/or the surface roughness. A similar correlation between H 3 /E 2 and the results of a dynamic fatigue test was also reported by Beake, who reported that resistance to crack propagation during repetitive impact increases with the decrease of H 3 /E 2 in the case of optical coatings [59].…”

Section: Discussionsupporting

confidence: 86%

“…It is usually observed that critical load for non-elastic deformation grows with the value of H 3 /E 2 and in turn postpones the fracture initiation during quasi-static indentation tests. On the other hand, damage tolerance was proved to scale reciprocally to H 3 /E 2 (i.e., to E 2 /H 3 ) during dynamic impact mechanical testing, as shown by Beake [59]. This clearly reflects the complexity of tribo/mechanical testing and emphasizes the peculiarities of different loading conditions (static, quasistatic, dynamic).…”

Section: Discussionmentioning

confidence: 93%

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Physical Properties of Modern Reciprocal Endodontic Systems and Fatigue Failure Testing in Simulated Clinical Conditions

et al. 2021

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Instrument fracture ranks among the most crucial complications during the endodontic treatment of a tooth. In order to better understand the practical limits of the instrument, the relation between the cyclic fatigue resistance and physical properties such as hardness, modulus of elasticity, creep and surface roughness were explored. Cyclic fatigue testing in an artificial root canal at intracanal temperature, nanoindentation and 3D microscopy were used for evaluation of four commonly used thermomechanically treated NiTi endodontic instruments (Unicone Plus 6/025, Unicone 6/025, Reciproc Blue R25 and WaveOne Gold Primary). Cyclic fatigue results were analyzed using the Kruskal–Wallis, Mann–Whitney and Bonferroni corrections. The wear resistance of Unicone 6/025 instruments was significantly lower compared to all other instruments (p < 0.05). WaveOne Gold Primary was significantly less resistant than Unicone Plus 6/025 and Reciproc Blue R25, while the difference between Reciproc Blue R25 and Unicone Plus 6/025 was insignificant (p > 0.05). These results are in correlation with measurements of local mechanical properties (hardness, elastic modulus and their ratios H/E and H3/E2). Even though surface roughness, area of cross-section and shape of instruments are important factors affecting instruments behavior, thermal processing appears to be the most important.

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Section: Discussionsupporting

confidence: 86%

Section: Discussionmentioning

confidence: 93%

Physical Properties of Modern Reciprocal Endodontic Systems and Fatigue Failure Testing in Simulated Clinical Conditions

et al. 2021

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“…This complexity of specific loading conditions and crystallographic phase mixture also contradicted the commonly used assumption that H/E scales with wear resistance. It was also reported that the resistance to plastic deformation, defined as the H3/E2 ratio, does not always directly increases with the threshold for nonelastic deformation as reported for dynamic contact [40]. This suggests that classical Archard theory relating the hardness to the wear rate holds for NiTi, at least under the loading conditions used in this study.…”

Section: Scratch and Wear Tests For The Niti Alloy And The Annealed N...mentioning

confidence: 46%

“…The particle boundary delamination or crushing for the as-prepared samples supported the hypothesis of improved mechanical durability in the case of the annealed samples. This clearly evidences that AE is a valuable method providing a unique insight into the deformation response of materials at an external loading [22,32,33,39,40]. The wear behavior was influenced by the presence of the precipitates of intermetallic phases such as Ni3Ti4 with a high capacity of transformations into the austenite phase.…”

Section: Scratch and Wear Tests For The Niti Alloy And The Annealed N...mentioning

confidence: 67%

Section: Scratch and Wear Tests For The Niti Alloy And The Annealed N...mentioning

confidence: 79%

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Tribological Behavior of NiTi Alloy Produced by Spark Plasma Sintering Method

et al. 2021

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The tribological behaviors of NiTi alloy produced by the spark plasma sintering (SPS) method before and after annealing were investigated at various loading conditions via indentation, scratch, and wear tests. Indentation tests were performed by a pyramidal Berkovich indenter, while scratch and wear tests were carried out by a diamond Rockwell spherical indenter at room temperature. The annealing of the as-prepared samples was performed at 350, 450, and 550 °C in the ambient atmosphere. The influence of the annealing temperature on the sample behavior towards tribological study was investigated here. The results indicated that the alloy annealed at 350 °C showed a higher hardness compared to the other annealed alloys. The scratch and wear resistance of the annealed sample at 350 °C showed a better performance in comparison to the other samples under a constant load. The high wear resistance of the annealed NiTi alloy may be attributed to its metastable R-phase. The detection and evaluation of acoustic emissions during the nano/micro-tribomechanical testing proved to be a very effective way for the exploration of the durability of SPS NiTi alloys.

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Randomised nano-/micro- impact testing – A novel experimental test method to simulate erosive damage caused by solid particle impacts

Beake,

Goodes,

Zhang

et al. 2024

Tribology International

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Nano- and micro-scale impact testing of zirconia, alumina and zirconia-alumina duplex optical coatings on glass

Cited by 4 publications

References 22 publications

Physical Properties of Modern Reciprocal Endodontic Systems and Fatigue Failure Testing in Simulated Clinical Conditions

Physical Properties of Modern Reciprocal Endodontic Systems and Fatigue Failure Testing in Simulated Clinical Conditions

Tribological Behavior of NiTi Alloy Produced by Spark Plasma Sintering Method

Randomised nano-/micro- impact testing – A novel experimental test method to simulate erosive damage caused by solid particle impacts

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