Hardness evaluation of thin ceramic coatings on tool steel

Attar, Fouad

doi:10.1016/0257-8972(94)02395-6

Cited by 17 publications

(5 citation statements)

References 4 publications

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“…However, in a practical situation, the hardness using similar indentations is found to vary with the load. The increase in hardness with decreasing load, which is known as indentation size effect, is often observed in bulk ceramics [36][37][38][39], physically and chemically vapour deposited ceramic coatings [40,41] as well as in plasma sprayed ceramic coatings [21,31,42,43]. In the present work, ISE also was observed ( Fig.…”

Section: Nano-hardness and Young's Modulussupporting

confidence: 71%

Nanoindentation study of microplasma sprayed hydroxyapatite coating

Dey

Mukhopadhyay

Gangadhaŕan

et al. 2009

Ceramics International

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Section: Nano-hardness and Young's Modulussupporting

confidence: 71%

Nanoindentation study of microplasma sprayed hydroxyapatite coating

Dey

Mukhopadhyay

Gangadhaŕan

et al. 2009

Ceramics International

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“…s [13] study, the increase in ceramic coating thickness resulted in an increase in surface hardness of the substrate.…”

Section: ⅳ Discussionmentioning

confidence: 92%

“…Dental implants also have TiN-coating for its excellence in biological and mechanical properties and the esthetic aspect of the "golden color" [10][11][12]. The coating may play a role in strengthening hardness of the surface [13].…”

Section: ⅰ Introductionmentioning

confidence: 99%

Evaluation of Titanium-nitride Coated Crown: Surface Hardness, Corrosion Resistance and Color Sustainability

Kim¹,

Lim²,

Kim³

2021

THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY

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The purpose of this study was to compare surface hardness between titanium-nitride coated crowns (TiNCs) and stainless steel crowns (SSCs), and to evaluate the corrosion resistance and color sustainability of TiNCs. Ten TiNCs and 10 SSCs were used for the hardness test. Measurement was performed 30 times for each type of crowns, and the mean values were compared. Metallic raw material plates (before being processed into crowns) of TiNCs and SSCs were prepared for the corrosion resistance test. The total amounts of metal ion releases in the test solution were detected by inductively coupled plasma-optical emission spectrometry. Five TiNCs were subjected to the color sustainability test by applying repetitive brushing forces. The mean hardness values of TiNC group and SSC group were 395.53 ± 105.90 Hv and 278.70 ± 31.45 Hv respectively. Hardness of TiNCs were significantly higher than that of SSCs. The total amounts of metal ion releases from the materials of TiNCs and SSCs satisfied the criterion in International Organization for Standardization 22674. The results mean that TiNCs and SSCs were not harmful in an acidic environment. The golden coating was stable against the repetitive physical stimulations for a given period time.

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“…Under this situation, ceramic coatings are very widely used as inorganic functional materials in many fields of application. [1][2][3] Especially, ceramic coatings on metals have been used for various industrial applications aimed at improving the resistance of metals to corrosion, erosion or abrasion, and at endowing metalwork with a decorative color. The object of thermal barrier coating TBC is to provide thermal insulation to metal components such as auto parts, thermal power parts, gas turbine, aeroengine applications and so on, at the elevated temperature.…”

Section: Introductionmentioning

confidence: 99%

Addition of Alkali Silicate to Grain Size-Controlled Ceramic Coatings for Dense Film

Muroya

Shimanoe

Haruta³

et al. 2006

J. Ceram. Soc. Japan

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ḩൎȡ֝൧ǦǮɃɱɧɋȷɁȇǽȪɳȳɲȹȬɛदᚊ‫ף‬ǺȗȚȻʀɎȫɻȸℋǽἻ‫ك‬ૅୖ᰾̘ɿɖᖅໞֳଉ ɿᆎᨀ౯Ԅଉ ଉ ɿଏԆֳଉ ɿ୮ᚊ Iଉ ఎগકগકрἕ۰ᥴకકಊᢼᥴకકଗფࢫ816-8580 ᱨ᭔ᆎᅠలᆎᅠӸ 6-1 ଉఎগકগકрἕ۰ᥴకકᮾ᳣рᢼᲇકȤϘࢫ816-8580 ᱨ᭔ᆎᅠలᆎᅠӸ 6-1 ଉ ଉ ሱBAHAM ཪᮾࢫ150-6019 ኇ̸ȩগᨀٚኇ‫ؤ‬ŋ 2-3-6-201Densification of a ceramic coating based on SiO 2 -Al 2 O 3 -TiO 2 using wet processing was investigated by controlling microscopic grains of materials used. The grains of the materials used in coating slurry were reduced from their initial size of about 10 mm to less than 5 mm in diameter using ball-milling. The ceramic composite films thus prepared were deposited about 100 mm in thickness on a steel plate by slurry coating with a doctor blade, followed by drying and calcination in air. It was found that the coating prepared was stable to heating up to 800c C in air, although the use of overly small grains easily caused cracks on the surface. By optimizing the amount of alkali silicate, however, such cracks could be eliminated from the coating, and the number of through-holes in the coating could be drastically decreased. The ceramic coating obtained by both the control of grain size in powders and the optimal addition of the alkali silicate showed excellent densification, thermal stability and adhesion strength.

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Hardness evaluation of thin ceramic coatings on tool steel

Cited by 17 publications

References 4 publications

Nanoindentation study of microplasma sprayed hydroxyapatite coating

Nanoindentation study of microplasma sprayed hydroxyapatite coating

Evaluation of Titanium-nitride Coated Crown: Surface Hardness, Corrosion Resistance and Color Sustainability

Addition of Alkali Silicate to Grain Size-Controlled Ceramic Coatings for Dense Film

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