Tribological Influences of CuO Into 3Y-TZP Ceramic Composite in Conformal Contact

Mazumder, Subhrojyoti; Kumar, Om Prakash; Kotnees, Dinesh Kumar; Mandal, Nilrudra

doi:10.1115/1.4041894

Cited by 18 publications

(2 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To solve this severe issue, adding lubricating additive into ceramics has become a major route to reduce the friction coefficient, such as metals (19), oxides (20)(21)(22), carbon nanotubes (CNTs) (23)(24)(25)(26)(27)(28), or graphene (26,(29)(30)(31)(32)(33)(34)(35)(36)(37)(38)(39). These lubricating additives could form lubricating film on the surface of the ceramic and alleviate the microstress in friction, so the cracks and microfracture could be inhibited.…”

Section: Ultralow Friction Coefficient Of the 2d Graphene Array/ceram...mentioning

confidence: 99%

Embedding two-dimensional graphene array in ceramic matrix

et al. 2020

View full text Add to dashboard Cite

Dispersing two-dimensional (2D) graphene sheets in 3D material matrix becomes a promising route to access the exceptional mechanical and electrical properties of individual graphene sheets in bulk quantities for macroscopic applications. However, this is highly restricted by the uncontrolled distribution and orientation of the graphene sheets in 3D structures as well as the weak graphene-matrix bonding and poor load transfer. Here, we propose a previously unreported avenue to embed ordered 2D graphene array into ceramics matrix, where the catastrophic fracture failure mode of brittle ceramics was transformed into stable crack propagation behavior with 250 to 500% improvement in the mechanical toughness. An unprecedentedly low dry sliding friction coefficient of 0.06 in bulk ceramics was obtained mainly due to the inhibition of the microcrack propagation by the ordered 2D graphene array. These unique and low-cost 2D graphene array/ceramic composites may find applications in severe environments with superior structural and functional properties.

show abstract

Section: Ultralow Friction Coefficient Of the 2d Graphene Array/ceram...mentioning

confidence: 99%

Embedding two-dimensional graphene array in ceramic matrix

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Song et al 21 investigated whether inclusion of nano CuO in 3Y‐TZP causes formation of a soft patchy layer and thus reduces COF from 0.72 to 0.30 at room temperature while sliding against alumina counterface. Mazumder et al 22 have also shown that CuO addition in 3Y‐TZP causes formation of tribo‐film on the substrate and reduces COF. Godet et al 23 and Fillot et al 24 suggested the concept of third body to explain the changes in COF at elevated temperatures and room temperature.…”

Section: Introductionmentioning

confidence: 95%

Effect of nano CuO addition on the tribo‐mechanical behavior of alumina ceramics in non‐conformal contact

Haldar¹,

Bhattacharya

Modak

2020

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

The well-known alumina ceramics have extensive structural application due to its outstanding physico-mechanical properties like hardness, wear resistance, good thermal conductivity, and thermal and chemical stability even at high temperature. 1 Its typical application includes in various engineering fields such as laser tubes, cutting tools, wear pads, high temperature electrical insulators, electronic substrates, automobiles, especially in unlubricated engines, aerospace, and even in biomaterials. 2-7 However, the fracture toughness of alumina ceramics is low, as a result, the material becomes brittle and thus its application reduces. Numerous research has been carried out to improve tribological behavior in conformal contact by incorporation of oxides like CuO, Y 2 O 3, ZrO 2, MgO, TiO 2 , Nb 2 O 3 8-12 and nonoxides like SiC, TiN, TiB 2 ,CNT 13 etc as a secondary phase in alumina matrix. Valefi et al 14 investigated the effect of CuO addition into yttria stabilized tetragonal zirconia polycrystalline (Y-TZP) ceramics sliding against alumina ball in conformal contact. They reported that the coefficient of friction (COF) reduces to 0.35 with a low wear rate (<10 −6 m 3 /N m) due to accumulation of soft copper oxide layer which causes shifting of the wear mechanism from brittle to ductile and increases wear resistance. The effect of different lubricating additives like TiC, CNT, CaF 2 etc to improve tribological attributes of alumina and alumina-zirconia composite up to a certain level of addition and range of temperature by reinforcement in the matrix was also reported by several researchers. 15-18 Countersurface plays an essential role on COF Kerkwijk et al 10 have reported that COF changes from 0.65 to 0.43 when Al 2 O 3 ball is replaced by Y-TZP ball as a counter surface on 5 wt.% CuO added alumina sintered. The tribo-mechanical properties of CuO/3Y-TZP composite system sliding upon Al 2 O 3

show abstract