Surface topography and roughness of silicon carbide ceramic matrix composites

In tissue engineering applications, various synthetic biodegradable polymers have got attention due to their excellent physical as well as biological properties. Polycaprolactone (PCL) has been identified as one of the best biocompatible polymers, which have wide applications in biomedical engineering. The surface properties of PCL have limited its utilization in tissue engineering. The researchers have also focused on the development of the PCL blends to enhance the surface characteristics. In the present study, carbonyl iron powder (CIP) reinforced PCL blends were fabricated by the solvent cast 3D printing (SC‐3DP) technique. The characterization techniques such as X‐ray diffraction, atomic force microscopy, and surface energy measurement by contact angle were used. The surface free energy of all the surfaces with their polar components was determined by Owens Wendt method. The fibroblasts cell responses were also examined for the assessment of biological properties. The results revealed that the increase in the percentage of CIP in the PCL matrix enhanced the value of surface free energy. The CIP reinforcement influenced the topography and surface roughness of the prepared composites. The change in surface properties affected the cell interactions on the surfaces, as investigated by cell viability test. The cell adhesion and viability were improved at a lower percentage of CIP.

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“…The RMS height reflects the deviation with respect to the reference plane, which is a better parameter to evaluate the surface roughness. [ 19 ]…”

Section: Resultsmentioning

confidence: 99%

Surface characterization of polycaprolactone and carbonyl iron powder composite fabricated by solvent cast 3D printing for tissue engineering

et al. 2020

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“…The specific experimental design is illustrated in Table 2. The parameter values for different levels have been set based on the preliminary trial experiments using one-factor-at-a-time approach, which is consistent to previous studies [26,27].…”

Section: Fabrication Of Sic Microchannels By Thin Diamond Wheel Grindingmentioning

confidence: 94%

“…In conventional grinding process, grinding processing parameters, i.e., the wheel speed (V s ), feed speed (V f ), and grinding depth (a p ), and grinding tool parameters, i.e., grit size (G) and wheel thicknesses (t), have been found to be the dominant factors for the grinding process and the surface characteristics [26,27]. Following the above results, in the present study, a series of microchannels are fabricated using different grinding processing parameters after extensive preliminary experimentations, i.e., wheel speed (V s ), feed speed (V f ), and grinding depth (a p ), by the thin diamond wheel grinding process.…”

Section: Fabrication Of Sic Microchannels By Thin Diamond Wheel Grindingmentioning

confidence: 99%

Fabrication of silicon carbide microchannels by thin diamond wheel grinding

Xie

Deng

et al. 2020

Int J Adv Manuf Technol

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Silicon carbide (SiC) microchannels are attractive for their wide applications in microsensors, MOS devices, UV photodiodes, microcatalytic reactors, and microchannel heat exchangers in harsh environments. However, the machining of SiC microchannels poses many challenges because of the difficulty and cost involved in the material removal process due to the high hardness and brittleness of SiC ceramic. In the present study, we developed a thin diamond wheel grinding process to fabricate SiC microchannels in a conventional vertical milling machine. Microchannels with trapezoidal shapes were successfully processed in SiC substrates by thin diamond wheels. The formation, geometric dimensions, and surface quality of SiC microchannels were studied together with the analysis of material removal mechanism. The effects of grinding processing parameters, i.e., wheel speed, feed speed, grinding depth, and grinding tool parameters including grit size and thickness of diamond grinding wheel, on the geometric dimension and surface morphology were comprehensively explored. The top width of microchannels first increased and then decreased with the increase in wheel speed, whereas a reverse tendency was observed with increasing grinding depth, feed speed, and grit size. The surface roughness decreased continuously with increasing wheel speed, but it tended to increase with the increase in feed speed generally. The variations in geometric dimensions and surface roughness of SiC microchannels can be related to the crack or fracture propagations and material removal mechanism during the thin diamond wheel grinding process. Besides, the influential significance of the above processing and grinding tool parameters were also evaluated by analysis of variance (ANOVA).

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“…Due to their properties, they are used, among others, in medicine (friction pair components of implants) [ 23 , 29 , 30 , 31 ]. Ceramic is a difficult to machine material but ceramic parts can be manufactured in conventional and unconventional machining processes [ 32 , 33 , 34 , 35 ]. The most frequently used method of machining, ensuring high efficiency and the accuracy of the manufacture of a ceramic object, is abrasive machining [ 36 , 37 ].…”

Section: Introductionmentioning

confidence: 99%

Stereometric and Tribometric Studies of Polymeric Pin and Ceramic Plate Friction Pair Components

Niemczewska-Wójcik

Wójcik²

2021

Materials

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Tw o complementary approaches should be used for the full characterisation of friction pair components. The first approach consists of stereometric studies of machined as well as worn surface topography of the friction components with multiple measurement methods used. The second approach, tribometric studies, enables the tribological characteristics of the friction pair. This work presents the complete characterisation of polymeric pin and ceramic plate friction pair components based on studies with the use of three research instruments: an interference microscope, a scanning electron microscope and a tribological tester. The results of the studies showed that the same treatment conditions used for different but similar ceramic materials did not provide exactly the same characteristics of both the machined and worn surface topography. Moreover, the results showed that the material properties and machined surface topography of the ceramic component significantly affected the friction coefficient and linear wear as well as the wear intensity of the polymeric component. Connecting the two approaches, stereometric studies and tribometric studies, allowed for a better identification of the wear mechanism of the polymeric pin (i.e., abrasion, fatigue and adhesion wear) and the kind of wear products (polymeric material).

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Surface topography and roughness of silicon carbide ceramic matrix composites

Cited by 68 publications

References 34 publications

Surface characterization of polycaprolactone and carbonyl iron powder composite fabricated by solvent cast 3D printing for tissue engineering

Surface characterization of polycaprolactone and carbonyl iron powder composite fabricated by solvent cast 3D printing for tissue engineering

Fabrication of silicon carbide microchannels by thin diamond wheel grinding

Stereometric and Tribometric Studies of Polymeric Pin and Ceramic Plate Friction Pair Components

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