scispace - formally typeset
Search or ask a question

Answers from top 8 papers

More filters
Papers (8)Insight
Therefore, C/C composites with a high and medium textured RL pyrolytic carbon may satisfy the requirements of aircraft brakes.
Carbon fiber reinforced ceramic matrix ceramic/polymers composites have excellent physical-mechanical properties for their specific strength, high hardness, and strong fracture toughness relative to their matrix, and they also possess a good performance of wear resistance, heat resistance, dimensional stability, and ablation resistance.
It was also concluded that carbon fiber has been identified as the most successful carbon based material in terms of durability property among the materials in this study.
This technique has a potential as a probing method in material characterization which has been vastly underestimated, particularly in the case of continuous-fiber ceramic composites (CFCCs), where, in addition to helping in the description of damage development, it can yield important information on fiber-matrix interfacial phenomena as well.
Above 400 °C the changes are broadly consistent with the replacement of carbon by silica at the fibre-matrix interface, release of residual stress and softening of the glass-ceramic matrix.
The existence of temperature-dependent friction and wear regimes in ambient air implies that the performance of brakes made with C/C composites is markedly affected by the thermal properties of the composites, the humidity content in the atmosphere, and operating conditions that can influence the operational temperature of these brakes.
So the models can be used to predict the temperature-dependent fracture strength of fiber-reinforced ceramic matrix composites.
The macroscopic wear behaviour of disc brakes can be explained by the growth and destruction of mesoscopic contact plateaus.

See what other people are reading

How effective are adsorption-based water filters for water quality for drinking water?
5 answers
Adsorption-based water filters, such as those utilizing powdered activated carbon (PAC) and metal-organic frameworks (MOFs), are highly effective for improving drinking water quality. These filters can efficiently remove taste- and odor-causing compounds, synthetic organic chemicals, heavy metals, and other contaminants from water. Studies have shown that combining PAC with ceramic membranes can significantly enhance the removal of organic pollutants and pharmaceuticals from water, while also mitigating membrane fouling. Additionally, MOF-based adsorbents have been successfully tested in home water filters, meeting stringent reduction thresholds for various metals, ensuring clean and safe drinking water. Overall, adsorption-based water filters offer a reliable and affordable solution for improving water quality and ensuring access to potable water.
How cfrp waste can be utilised in mortar?
5 answers
CFRP waste can be effectively utilized in mortar to enhance its properties and reduce environmental impact. By incorporating recycled concrete powder (RCP) and spontaneous combustion gangue powder (SCGP) as supplementary materials, the mechanical and durability properties of mortar can be improved, with a suitable combination of 15% RCP and 15% SCGP maintaining comparable mechanical properties to control mixes. Additionally, the use of construction waste micro powder along with various other components like cement, sand, and additives can create construction mortar that reduces environmental pollution and waste. Furthermore, incorporating ceramic waste as a substitute for fine aggregate in mortars can lead to superior results, with 10% ceramic waste showing high strengths and improved microstructural properties. Overall, utilizing CFRP waste in mortar presents a sustainable solution for enhancing performance while reducing environmental impact.
Was ist stress shielding?
5 answers
Stress shielding is a biomechanical phenomenon observed in various medical and engineering contexts. In orthopedics, stress shielding occurs around metallic implants, leading to adaptive changes in bone strength and stiffness, potentially causing implant loosening. This effect is also seen in ligament reconstruction, where nonabsorbable suture augmentation aims to protect the reconstructed ligament but may inadvertently reduce stress on it, impacting its final strength and composition. In the field of ceramic binder jetting, stress shielding arises from unbalanced stresses between printed and unprinted regions, affecting the density of the final part. In total shoulder arthroplasty, stress shielding of the humeral stem is common at midterm follow-up but does not significantly impact functional outcomes.
Can membrane technology effectively remove microplastics?
5 answers
Membrane technology, particularly ultrafiltration, offers a promising solution for effectively removing microplastics from water systems. These membranes with small pores can filter out microplastics, addressing the growing concern of microplastic contamination in aquatic environments. However, challenges such as membrane fouling and the passage of smaller microplastics through the filter still exist, highlighting the need for continuous improvement in membrane design and technology. Studies have shown that different types and shapes of microplastics can impact the efficiency of filtration processes, emphasizing the importance of understanding these factors for enhancing microplastic removal efficacy. Overall, membrane-based methods like ultrafiltration demonstrate high potential for efficient microplastic separation, but ongoing research is essential to optimize membrane performance and minimize environmental impacts.
What are the potential benefits of using recycled aluminum in composite materials?
4 answers
Recycling aluminum for composite materials offers various advantages. Firstly, it aids in waste management and reduces environmental pollution. Secondly, incorporating recycled aluminum in composites enhances properties like specific strength, stiffness, wear resistance, and thermal stability. Additionally, the reuse of aluminum waste in composites can lead to significant improvements in mechanical properties such as hardness, compressive strength, and tensile strength. Moreover, utilizing recycled aluminum in composites can result in cost-effective manufacturing processes while revaluing metallic waste. Overall, the use of recycled aluminum in composite materials not only contributes to sustainability by reducing resource depletion but also enhances material performance and offers economic benefits.
What are the advantages of using WAAM in manufacturing processes?
5 answers
Wire Arc Additive Manufacturing (WAAM) offers several advantages in manufacturing processes. WAAM enables the efficient production of large-scale components with reduced lead times, minimal material waste, and cost-effectiveness. It has been successfully utilized in various industries like aerospace, automotive, and shipbuilding. The technology allows for the in-situ manufacturing of complex structures with integrated material-structure-function components, providing solutions for components with surface performance requirements and individual structural features. WAAM also exhibits high efficiency in fabricating components, while the hybridization with Laser Directed Energy Deposition (LDED) enhances precision and surface flatness, resulting in well-fabricated samples with improved mechanical properties and microstructures. Additionally, WAAM materials have shown good yield and ultimate strengths, albeit with slightly lower ductility compared to conventional stainless steel, making them suitable for construction applications.
What sterilization method can be used to sterilize spinal implants?
4 answers
To sterilize spinal implants, various methods can be employed. One method involves utilizing an ozone-air mixture with specific ozone concentrations and exposure durations, followed by final irradiation with a fast electron beam for effective sterilization and hermetic packaging of bone implants. Additionally, a surgical kit can be utilized, containing sterilized spinal implants and instrumentation for spinal surgery, ensuring aseptic conditions during the procedure. Moreover, incorporating antimicrobial metal cations into ceramic particles, such as zeolites, post-charged with ammonium ions, can provide a method for sterilizing implantable devices like spinal implants, especially when combined with a thermoplastic polymer like polyaryletheretherketone (PEEK). These methods collectively offer comprehensive approaches to ensure the sterility of spinal implants for safe surgical procedures.
What are the factors that influence the tensile spring force during peeling?
5 answers
The factors influencing tensile spring force during peeling include various parameters such as viscosity, web tension, separation velocity, fluid volume, and fluid geometry. Additionally, the boundary conditions at the interface between the tape and the substrate play a crucial role, with stuck adhesion and relative sliding affecting the peeling behavior significantly. Peeling velocity is another critical factor, where at small peeling angles, a tougher peeling behavior is predicted, impacting the attachment force and locomotion in biological systems like geckos and spiders. Furthermore, stress and orientation during the extrusion coating process can influence peel strength by affecting tensile properties and residual stress at the foil-polymer interface, with processing parameters like air gap, die gap, melt temperature, and line speed playing a role.
How is low carbon steel better than iron in industrial pipes?
5 answers
Low carbon steel offers superior corrosion resistance compared to conventional carbon steel and iron in industrial pipes due to its composition and microstructural characteristics. Additionally, low carbon steel exhibits uniform residual stress profiles with lower welding heat inputs, preventing stress concentration and maintaining mechanical properties. Furthermore, the microstructural analysis of low carbon steel shows enhanced ductility, toughness, and grain refinement after heat treatment, resulting in decreased hardness and brittleness, making it a favorable choice for industrial applications. Moreover, anodic iron oxide layers grown on low carbon steel surfaces demonstrate promising photoelectrochemical behavior, resembling expensive materials like α-Fe2O3, enhancing their functionality in specific applications.
What is the effect of oxidation on the mechanical properties of FG coatings produced by plasma spraying of aluminum?
5 answers
Oxidation plays a significant role in influencing the mechanical properties of FG coatings produced by plasma spraying of aluminum. The increase in particle temperature during the spraying process leads to a substantial enhancement in hardness and indentation modulus of the coatings. Additionally, the selection of plasma spray parameters, such as torch scan speed and stand-off distance, affects the microstructure densification, mechanical properties, and cavitation erosion resistance of the coatings. Moreover, the plasma spraying power, powder feeding rate, and initial substrate temperature are crucial factors that impact the porosity, wear resistance, and mechanical characteristics of the coatings. Furthermore, the tribological, microscopic, and mechanical properties of Al2O3 + TiO2 coatings are influenced by the spray parameters, with a compact structure achieved by adjusting the spray distance and torch velocity, resulting in improved adhesion and wear resistance.
How does the preproccess surface influence the milling proccess?
5 answers
The preprocessed surface significantly impacts the milling process quality and reliability. Flawed surfaces, such as those with micro-defects, can lead to fluctuations in cutting force, affecting the machined surface quality during repair processes. Similarly, the destruction of tool ceramics due to structural heterogeneity and defects formed during grinding can reduce reliability, limiting industrial applications of ceramic cutting tools. Moreover, the surface characteristics and quality of inserts processed by various abrasive treatments influence the reliability of end mills, with improved coatings showing decreased resistance variation and enhanced tool performance. Additionally, digital processing of milled surface data directly affects parameters like Sq, highlighting the importance of accurate measurement data processing for surface quality assessment.