“…37 The deposition of MWNCTs on titanium caused about a 10% decrease under dry conditions, but even a 90% decrease in SBF (simulated body uid), 14 and a moderate change in wear volume from 14.14 × 10 6 to 10.6 × 10 6 mm 3 was found aer adding CNTs to TiO 2 in the sprayedmade coating. 32 A decreasing current density was noticed for the CNT-Hap coating from 0.54 to 0.05 mA cm −2 at 1 wt% CNTs. 22 On the contrary, aer adding MWCNTs to HAp-Ta 2 O coating, corrosion current density increased from 0.011 to 0.021 mA cm −2 .…”
Herein a MWCNT/TiO2 coating was shown to have higher roughness, adhesion strength and corrosion resistance compared to MWCNT, also with high porosity and wettability to support cell adhesion. However, the release of toxic species results in decreased proliferation.
“…37 The deposition of MWNCTs on titanium caused about a 10% decrease under dry conditions, but even a 90% decrease in SBF (simulated body uid), 14 and a moderate change in wear volume from 14.14 × 10 6 to 10.6 × 10 6 mm 3 was found aer adding CNTs to TiO 2 in the sprayedmade coating. 32 A decreasing current density was noticed for the CNT-Hap coating from 0.54 to 0.05 mA cm −2 at 1 wt% CNTs. 22 On the contrary, aer adding MWCNTs to HAp-Ta 2 O coating, corrosion current density increased from 0.011 to 0.021 mA cm −2 .…”
Herein a MWCNT/TiO2 coating was shown to have higher roughness, adhesion strength and corrosion resistance compared to MWCNT, also with high porosity and wettability to support cell adhesion. However, the release of toxic species results in decreased proliferation.
“…Comparative exploration of the tribological properties of TiO 2 -CNT and TiO 2 coatings was carried out using constant load scratch tests. 143 Then, the ability of TiO 2 and TiO 2 -CNT coatings for resisting scratch damage was compared using the micro-scratch method. Eqn (12) can be used as a wear model for evaluating the scratching and anti-scratch performance ( W R ) of ceramic coatings, 144 as follows: where H V and K IC are the micro-hardness and fracture toughness of the coating, respectively, F n is the normal load, L is the sliding distance, and ∝ is the proportional relationship.…”
The typical nanofillers, involving 0D nanofillers, 1D nanofillers , 2D nanofillers, and 3D nanofillers for friction reduction and anti-wear of metal/ceramic/polymer matrix composite coatings are shown in the picture.
“…CNTs have been recognized as an ideal reinforcement for alumina composites because of their excellent mechanical and electrical properties [1][2][3]; however, the excellent properties of CNTs cannot guarantee that the reinforced alumina composites will achieve the expected performance. The main reason is that interfacial characteristics have important effects on the mechanical properties of CNTs and their reinforced composites [4,5]. In CNT-reinforced composites, CNTs are easily pinned in the grain interiors.…”
The interface of carbon nanotube (CNTs)/alumina ceramic composites has a very important effect on their mechanical properties. In this study, an appropriate theoretical cell model was established to study the interfacial stress transmission in CNT/alumina composites. The stress transfer equation is derived as follows: The tensile stress of the CNTs and interfacial shear stress were simulated under an axial tension load, and the relationship between the stress transmission and the effective length of the CNTs was analyzed. The theoretical results were compared with the FEM results, and the results were found to be in good agreement. This study can provide a theoretical basis for adjusting the appropriate length of CNTs and interfacial interactions under different tension loads.
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