Influence of roughness on the efficacy of grazing incidence X-ray diffraction to characterize grinding-induced phase changes in yttria-tetragonal zirconia polycrystals (Y-TZP)

Strasberg, Matthew; Barrett, Allyson A.; Anusavice, Kenneth J.; Mecholsky, John J.; Nino, Juan C.

doi:10.1007/s10853-013-7846-z

Cited by 12 publications

(9 citation statements)

References 56 publications

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“…Larger incidence angles result in deeper x-ray penetration, giving information on subsurface phases. 32,52 In this study, a series of GIXRD profiles were performed at incidence angles from 1°to 9°and showed that the intensity of the diffraction peak of the monoclinic phase decreased as the penetration depth increased; however, the maximum GIXRD incidence angle is 9°, which corresponds to a penetration depth of 5.06 μm. Thus, semi-log linear regression protocols were used to extrapolate the full depth of phase transformation.…”

Section: Discussionmentioning

confidence: 82%

“…GIXRD is a non‐destructive technique, which is able to characterize in‐depth phase composition as a function of incidence angle. Larger incidence angles result in deeper x‐ray penetration, giving information on subsurface phases . In this study, a series of GIXRD profiles were performed at incidence angles from 1° to 9° and showed that the intensity of the diffraction peak of the monoclinic phase decreased as the penetration depth increased; however, the maximum GIXRD incidence angle is 9°, which corresponds to a penetration depth of 5.06 μm.…”

Section: Discussionmentioning

confidence: 85%

“…An adequate Weibull fit is suggestive of a consistent underlying flaw population, with single dominant flaw type. However, ceramics typically contain two or more flaw distributions . These flaws may result from intrinsic factors associated with processing, e.g., pores, inclusions, distributed micro‐crack along grain boundaries, phase changes during processing, or chemical variations.…”

Section: Discussionmentioning

confidence: 99%

“…However, ceramics typically contain two or more flaw distributions. 47,52 These flaws may result from intrinsic factors associated with processing, e.g., pores, inclusions, distributed micro-crack along grain boundaries, phase changes during processing, or chemical variations. Meanwhile extrinsic flaws could also be produced as a result of surface modification, e.g., grinding adjustment or air abrasion.…”

Section: Discussionmentioning

confidence: 99%

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Effect of Surface Modification on In‐Depth Transformations and Flexural Strength of Zirconia Ceramics

Wongkamhaeng

Dawson

Holloway

et al. 2018

Journal of Prosthodontics

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Section: Discussionmentioning

confidence: 82%

Section: Discussionmentioning

confidence: 85%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Surface Modification on In‐Depth Transformations and Flexural Strength of Zirconia Ceramics

Wongkamhaeng

Dawson

Holloway

et al. 2018

Journal of Prosthodontics

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“…We interpret this phase to be zirconia as introduced by milling with zirconia beads during preparation process. A minor XRD reflection at 2θ ~30° in XRD patterns of YPO 4 ceramics (Figure 2A) may arise from this phase which was potentially formed during sintering by reaction of ZrO 2 with omnipresent Y to tetragonal Y-stabilized zirconia (Y-TZP; Strasberg et al, 2014).…”

Section: Resultsmentioning

confidence: 99%

The Quantification of Radiation Damage in Orthophosphates Using Confocal μ-Luminescence Spectroscopy of Nd3+

et al. 2019

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In this study, we present a new concept based on the steady-state, laser-induced photoluminescence of Nd3+, which aims at a direct determination of the amorphous fraction f a in monazite- and xenotime-type orthophosphates on a micrometer scale. Polycrystalline, cold-pressed, sintered LaPO4, and YPO4 ceramics were exposed to quadruple Au-ion irradiation with ion energies 35 MeV (50% of the respective total fluence), 22 MeV (21%), 14 MeV (16%), and 7 MeV (13%). Total irradiation fluences were varied in the range 1.6 × 1013–6.5 × 1013 ions/cm2. Ion-irradiation resulted in amorphization and damage accumulation unto a depth of ~5 μm below the irradiated surfaces. The amorphous fraction created was quantified by means of surface-sensitive grazing-incidence X-ray diffraction and photoluminescence spectroscopy using state-of-the-art confocal spectrometers with spatial resolution in the μm range. Monazite-type LaPO4 was found to be more susceptible to ion-irradiation induced damage accumulation than xenotime-type YPO4. Transmission electron microscopy of lamella cut from irradiated surfaces with the focused-ion beam technique confirmed damage depth-profiles with those obtained from PL hyperspectral mapping. Potential analytical advantages that arise from an improved characterization and quantification of radiation damage (i.e., f a) on the μm-scale are discussed.

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Effect of air‐abrasion at pre‐ and/or post‐sintered stage and hydrothermal aging on surface roughness, phase transformation, and flexural strength of multilayered monolithic zirconia

Yilmaz

Okutan

2020

J Biomed Mater Res

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This study aimed to evaluate the effect of air‐abrasion/sintering order and autoclave aging on the surface roughness (Ra), phase transformation, and biaxial flexural strength (BFS) of monolithic zirconia. A total of 104 monolithic zirconia specimens (Katana ML) were divided into eight groups according to airborne‐particle abrasion protocols and hydrothermal aging: control (non‐aged: C‐, aged: C+), air‐abrasion before sintering (BS‐, BS+), air‐abrasion after sintering (AS‐, AS+), and air‐abrasion before and after sintering (BAS‐, BAS+). A steam autoclave was used for accelerated aging, and Ra values were measured with a surface profilometer. All specimens were analyzed by X‐ray diffraction to determine any phase transformation on the zirconia surface. BFS was measured by using the piston‐on‐three‐balls method. Scanning electron microscopy and atomic force microscopy were performed on one specimen per group. BS and BAS groups showed higher Ra values compared with groups C and AS. The aging process significantly increased the monoclinic phase content of all specimens. Lower monoclinic levels were found in AS+ and BAS+ compared with other aged groups. The AS groups exhibited higher flexural strength values relative to control groups, whereas BS groups exhibited significantly lower flexural strength values (p < .05). There was no reduction in flexural strength by using the BAS protocol. Air‐abrasion of zirconia at the pre‐sintered stage only is not recommended in clinical use because of the remarkable decrease in flexural strength.

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Influence of roughness on the efficacy of grazing incidence X-ray diffraction to characterize grinding-induced phase changes in yttria-tetragonal zirconia polycrystals (Y-TZP)

Cited by 12 publications

References 56 publications

Effect of Surface Modification on In‐Depth Transformations and Flexural Strength of Zirconia Ceramics

Effect of Surface Modification on In‐Depth Transformations and Flexural Strength of Zirconia Ceramics

The Quantification of Radiation Damage in Orthophosphates Using Confocal μ-Luminescence Spectroscopy of Nd3+

Effect of air‐abrasion at pre‐ and/or post‐sintered stage and hydrothermal aging on surface roughness, phase transformation, and flexural strength of multilayered monolithic zirconia

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