Effect of interface layers formed during dry sliding of zirconia toughened alumina (ZTA) and monolithic alumina against steel

Ravikiran, A.; Subbanna, G.R.; Bai, Bo

doi:10.1016/0043-1648(95)06754-x

Cited by 30 publications

(15 citation statements)

References 17 publications

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“…Friction and wear reducing layers were built up by densifying of the wear particles. This was accompanied by tribo-chemical reactions such as formation of Fe 2 O 3 , FeO, Fe 3 O 4 or FeAl 2 O 4 , respectively [11,23,24]. In the contact area of the SSiC/steel-pairs, SiO x layers and silicides can be formed at higher temperatures [24].…”

Section: Discussionmentioning

confidence: 99%

TiN‐Particle reinforced alumina for unlubricated tribological applications mated with metallic counterbodies

Poser¹,

Rohde

Schneider

et al. 2005

Materialwissenschaft Werkst

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With respect to the application in unlubricated friction systems like dry clutches a commercially available, slightly porous monolithic alumina was modified using laser irradiation by embedding TiN particles. The materials development was carried out by experimental studies and numerical simulation. Temperature and velocity profiles of the molten alumina and the dispersed TiN particles during laser processing were calculated using a finite volume program (PHOENICS). Tribological properties of the modified ceramics were characterized in unlubricated sliding contact with the grey cast iron GJL-250 and the steel 100Cr6 using a pin-on-disc tribometer. Frictional and wear behaviour were analysed at varied sliding speeds. Commercial alumina and silicon carbide ceramics were used as reference materials.The friction and wear behaviour were determined by mechanical interactions, mainly abrasive processes, material transfer and formation of surface layers from densified wear particles, combined with tribochemical reactions. Sliding pairs with the lasermodified multiphase ceramics showed a greater wear resistance and a greater constancy of the friction coefficient with increasing sliding speed compared to the commercial Al 2 O 3 ceramic.Keywords

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Section: Discussionmentioning

confidence: 99%

TiN‐Particle reinforced alumina for unlubricated tribological applications mated with metallic counterbodies

Poser¹,

Rohde

Schneider

et al. 2005

Materialwissenschaft Werkst

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“…[1][2][3][4][5] It was found that the transition from a mild to a severe wear process in these composites can be shifted to more extreme operating conditions, for instance, higher loads and higher velocities. 4,6,7 The use of metastable zirconia particles as a reinforcing element improves wear resistance through the suppression of crack initiation and propagation due to the higher value of fracture toughness. Moreover, it must be possible to inhibit the grain growth of the alumina phase during sintering, if a homogeneous distribution of the zirconia phase is obtained.…”

Section: Introductionmentioning

confidence: 99%

Percolative mechanism of sliding wear in alumina/zirconia composites

Bartolomé

Pecharromán

Moya

et al. 2006

Journal of the European Ceramic Society

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“…The identical composition of the main phases in both coatings (Table 1) is the main factor responsible for the similar values of those parameters. In the friction zone (at high loading rates) those phases form secondary structures of similar composition, apparently including β-thialite Al 2 TiO 5 and the aluminide FeAlO 3 , which act as solid lubricants under the conditions of dry friction [6]. As the current pulse frequency increases, so does the Ti:Al ratio in the coating (Table 2), which explains why its microhardness and Young's modulus decrease.…”

Section: Tribological and Micromechanical Characteristicsmentioning

confidence: 93%

Effect of current pulse frequency on the structure and properties of electric-spark alloyed coatings of the Ti - Al - N system

Podchernyaeva

Panasyuk

Teplenko

et al. 2004

Powder Metall Met Ceram

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ev, T. V. Mosina, and R. K. Ivashchenko UDC 621.726 The mass transfer kinetics, composition, structure, and properties of coatings, formed by high-frequency electric-spark alloying of 45 and 40X steels with the Ti − Al (3:1, 1:1, 1:3) intermetallics and TiN − AIN (1:1) nitride were studied as a function of the current pulse frequency(ν =1200 and 1600 Hz). A decrease in ν was found to lead to a higher mass transfer coefficient and higher microhardness and Young's modulus of the coating as well. This is due to the decrease in the Ti/Al ratio on the surface. The phase composition of intermetallic and nitride coatings differed only insignificantly and did not depend on the value of ν. The main phases of the coatings were Fe − Ti − O and Al − Ti − O solid solutions. The nitride and intermetallic coatings had similar friction coefficients f and wear rates I (f = 0.26 and 0.28, I = 5.4 and 5.9 µm/km), despite the difference in their structure. We can assume that the coating phase composition which defines the composition of the secondary structure under dry friction, is the main factor controlling tribological behavior.

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Effect of interface layers formed during dry sliding of zirconia toughened alumina (ZTA) and monolithic alumina against steel

Cited by 30 publications

References 17 publications

TiN‐Particle reinforced alumina for unlubricated tribological applications mated with metallic counterbodies

TiN‐Particle reinforced alumina for unlubricated tribological applications mated with metallic counterbodies

Percolative mechanism of sliding wear in alumina/zirconia composites

Effect of current pulse frequency on the structure and properties of electric-spark alloyed coatings of the Ti - Al - N system

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