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Sun, Ziqi; Zhou, Yanchun; Li, M.

doi:10.1023/a:1015363119164

Cited by 28 publications

(17 citation statements)

References 14 publications

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“…Sun et a1. 29 previously reported that the scale formed on Ti 3 SiC 2 -base materials was adherent and resistant to cyclic oxidation at 1100°C in air, because the thermal-expansion coefficients of TiO 2 , SiO 2 and Ti 3 SiC 2 were quite close to each other. 16 Figure 9 shows the Ti 3 SiC 2 specimen after oxidation at 1200°C for 100 h in air.…”

Section: Resultsmentioning

confidence: 89%

Oxidation of Ti3SiC2 between 900 and 1200 °C in Air

Lee

Park²

2006

Oxid Met

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Ti 3 SiC 2 materials were synthesized by hot pressing using a new startingmaterial system consisting of a TiC x (x=0.6)/Si powder mixture. The oxidation of Ti 3 SiC 2 at temperatures between 900 and 1200°C in air for up to 100 h resulted in the formation of an outer TiO 2 layer, an intermediate SiO 2 -rich layer and an inner (TiO 2 + SiO 2 ) mixed layer. During oxidation, Ti diffused outwards to form the outer TiO 2 layer, and oxygen transported inwards to form the inner (TiO 2 + SiO 2 ) mixed layer. At the same time, the carbon in Ti 3 SiC 2 escaped into the air. Below the scale, there was a narrow oxygen-affected zone, The oxidation at the scale-matrix interface proceeded by the disintegration of the lamellar Ti 3 SiC 2 grains to form crystallites with a size of a few tens of nanometers containing oxygen. The detailed scale characteristics and oxidation mechanism are described.

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Section: Resultsmentioning

confidence: 89%

Oxidation of Ti3SiC2 between 900 and 1200 °C in Air

Lee

Park²

2006

Oxid Met

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“…4a). Like Ti 3 SiC 2 and Ti 3 AlC 2 [2][3][4][5][6][7][8][9][10][11][12][13][14], rutile-TiO 2 was present as the outer surface oxide (Fig. 5a).…”

Section: Resultsmentioning

confidence: 99%

“…Al 2 O 3 ) and (TiO 2 ? SiO 2 ), respectively, together with the evolution of CO or CO 2 [2][3][4][5][6][7][8][9][10][11][12][13][14]. In the case of Ti 3 SiC 2 , the SiO 2 that was formed was reportedly in the form of an amorphous phase [2,5,6,8], tridymite [4], or cristobalite [2,5,7], depending on the investigators.…”

Section: Resultsmentioning

confidence: 99%

“…Factors affecting the oxide formation were the sample composition, the anisotropy of the matrix grains, the escape of carbon, the variation in the sample purity and sample density, and the variable matrix grain size. The cyclic oxidation behavior of Ti 3 AlC 2 and Ti 3 SiC 2 was also studied [2,9,14]. The oxide scales formed on these carbides did not spall and resistant to cyclic oxidation.…”

Section: Introductionmentioning

confidence: 99%

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Cyclic-Oxidation Behavior of Ti3Al0.7Si0.3C2 Compounds Between 900 and 1100 °C in Air

Nguyen

Park²,

Lee

2009

Oxid Met

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Dense, monolithic Ti 3 Al 0.7 Si 0.3 C 2 compounds were cyclically oxidized between 900 and 1100°C in air for 100 h. Ti 3 Al 0.7 Si 0.3 C 2 oxidized into rutileTiO 2 , a-Al 2 O 3 , and amorphous SiO 2 , accompanied by the evaporation of carbon. Ti 3 Al 0.7 Si 0.3 C 2 had good thermal shock resistance, so that adherent oxide scales formed, regardless of their thickness. The cyclic oxidation resistance of Ti 3 Al 0.7 Si 0.3 C 2 was poorer than that of Ti 3 SiC 2 , Ti 3 AlC 2 , and Cr 2 AlC. The thermal cycling did not affect the scale morphology or the oxidation mechanism that was identified in the isothermal oxidation tests, due mainly to the formation of the adherent oxide scales.

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“…Similar oxidation could occur in thermal-treated Ti 3 SiC 2 coating surfaces. The oxidation process was controlled by the inward diffusion of oxygen and the outward diffusion of titanium, resulting in a stratified structure of an outer rutile and an inner rutile/silica layer [18][19][20]. Lubricious rutile with tribo-oxidation or pre-oxidation treatment has been proved to be effective in reducing the friction and wear of Ti-based alloys [21,22] as well as Ti 3 SiC 2 [23].…”

Section: Introductionmentioning

confidence: 99%

Torsional Fretting Wear Properties of Thermal Oxidation-Treated Ti3SiC2 Coatings

2018

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In this study, efforts were made to oxidize the Ti3SiC2 coating surface to improve its wear resistance by producing oxide layers and healing microcracks that initiated from the thermal sprayed process. Tribological behaviors of the thermal oxidation-treated Ti3SiC2 coatings subjected to various temperatures (200, 300, and 400 °C) and durations (1, 3, and 5 h) were investigated comparatively by fretting wear. The results showed that the thickness of the oxide layer and the average content of element O on the surface were gradually increased with increasing temperature. Lower friction coefficients were observed in coatings at 200–400 °C for 1 h. Better performance of crack-healing features was demonstrated at 400 °C, whereas fresh microcracks were formed under the fretting condition due to the fragility of oxides at the same time. The tribological behavior of thermal oxidation-treated Ti3SiC2 coatings was mainly controlled by delamination and abrasive wear. The volume losses induced by wear scars decreased with the increase in oxidation time under the oxidation treatment at 200 °C and increased with increasing oxidation time under the oxidation temperatures of 300 and 400 °C.

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Cited by 28 publications

References 14 publications

Oxidation of Ti3SiC2 between 900 and 1200 °C in Air

Oxidation of Ti3SiC2 between 900 and 1200 °C in Air

Cyclic-Oxidation Behavior of Ti3Al0.7Si0.3C2 Compounds Between 900 and 1100 °C in Air

Torsional Fretting Wear Properties of Thermal Oxidation-Treated Ti3SiC2 Coatings

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