scispace - formally typeset
Search or ask a question

Answers from top 9 papers

More filters
Papers (9)Insight
The results are particularly important for the design of future ceramic materials combining tailored thermal properties, mechanical properties, electrical conductivity and oxidation resistance.
A comparison between the chemical and mineralogical compositions of good-quality ceramic objects and those of waste products indicated local production of the ceramics.
These properties are comparable to those for ceramics obtained through conventional ceramic processing.
Each of these distributions can have a strong influence on ceramic processing and on the properties of ceramic products.
These materials have tailorable microstructure and properties, and behave like ceramic materials manufactured by advanced ceramic processing approaches.
This result is in a good agreement with experimental results obtained from the strength measurements of ceramic materials with controlled flaws.
The results indicated that the ceramic body from Campos presents significant differences in the evaluated characteristics in comparison with the other ceramic bodies.
The results show that such ceramic/ceramic composite microstructure has the potential for tailoring properties of future piezoelectric materials over a wider range than is possible in uniform compositions.
The results indicate that surfactants influence strongly the morphology of ceramic coatings and play an essential role to fabricate a ceramic coating with low porosity.

See what other people are reading

Why higher amounts of Mullite and Corundum can improve the strength and thermal stability of the castable aluminatematerial.?
5 answers
Higher amounts of Mullite and Corundum can enhance the strength and thermal stability of castable alumina material due to their unique properties. Mullite, a combination compound of alumina and silica, offers good strength at high temperatures, low density, and excellent thermal shock resistance. Incorporating Mullite in refractories can improve volume stability, cold modulus of rupture, and thermal shock resistance, especially when pre-calcined at higher temperatures. Additionally, the addition of spherical alumina can increase the cold crushing strength of ramming mullite-corundum mixes, intensify mullite synthesis, and enhance thermal shock resistance of the samples. Furthermore, sol-gel bonding systems like mullite and spinel can improve cold strength and thermal shock resistance, attributed to microcracking effects from thermal expansion mismatch. These findings collectively support the idea that higher amounts of Mullite and Corundum can significantly boost the mechanical and thermal properties of castable alumina materials.
What are the specific mechanisms underlying the porosity-reducing effect of atomized flows in high-pressure die cast products?
5 answers
The reduction of porosity in high-pressure die cast products can be achieved through various mechanisms. One significant approach involves optimizing the die cooling process to enhance heat transfer coefficients (HTC) in the cooling channel, thereby reducing internal porosity. Another crucial factor is the design of the gating system, which influences air entrapment during the casting cycle and can impact porosity levels in the final product. Additionally, incorporating returnable material in the casting process can affect porosity, with higher amounts potentially altering the microstructure and porosity distribution in the castings. Vacuum pressure die casting (VPDC) is another effective method for reducing porosity, as it can lead to a significant decrease in porosity levels in high-pressure die cast products. These combined strategies contribute to minimizing porosity and enhancing the quality of high-pressure die cast components.
Is Na3V2(PO4)3 air stable?
5 answers
Na3V2(PO4)3, also known as NVP, is a promising cathode material for sodium-ion batteries due to its high stability and performance. Research indicates that NVP maintains good thermal stability, and its structural stability remains unaffected even after exposure to air for 10 days. The compound's high Na-ion mobility and stable structure make it a reliable choice for battery applications. However, the electrochemical performance of NVP may be slightly impacted by air exposure, leading to reduced specific capacity due to sluggish diffusion kinetics. Overall, while NVP demonstrates air stability in terms of structural integrity, its electrochemical performance may be affected by prolonged exposure to air.
What is the relationship between magnetoelasticity and the microstructure of grains in BiFeO3?
5 answers
The relationship between magnetoelasticity and the microstructure of grains in BiFeO3 is significant. Studies on BiFeO3 powders sintered by flash and spark plasma sintering revealed that a phase transition anomaly at 250 K is linked to magneto-elastic coupling, becoming less defined as grain sizes decrease. Additionally, BiFeO3-GdMnO3 solid solutions exhibited enhanced ferromagnetic properties with increasing GdMnO3 concentration, showcasing a strong magnetodielectric coupling. Furthermore, the magnetization of BiFeO3 powders synthesized through conventional sintering and ball milling correlated linearly with grain size, indicating finite size effects and the presence of exchange bias. The chemical composition variations in Bi1−xAexFe1−xTixO3 solid solutions influenced their crystal structure and magnetic behavior, with certain substitutions stabilizing weak ferromagnetic ferroelectric states.
What are types of nanoparticles?
5 answers
Nanoparticles can be classified into various types based on their composition and properties. They are categorized as organic, inorganic, carbon-based, metal, metal compound, ceramic, and metal-organic framework nanoparticles. Organic-based nanoparticles are derived from carbon atoms and include fullerene, graphene, nanodiamond, and carbon nanotubes (CNTs). Inorganic-based nanoparticles consist of metals and metal compounds, while composite-based nanoparticles are a combination of different materials. These nanoparticles exhibit unique physical and chemical properties due to their nanoscale size and high surface area, making them suitable for various applications in fields like medicine, environment, energy, and industries.
What materials are best for using with a nanoindenter?
4 answers
Nanoindentation is a versatile technique used to evaluate the mechanical properties of various materials. Different materials have been studied using nanoindentation, including rocks like shale, coal, limestone, marble, sandstone, and claystone. Additionally, supercrystalline nanocomposites (SCNCs) have shown promise for functional applications, with their mechanical behavior assessed through nanoindentation studies. Nanoindentation tests have also been conducted on Ti-based composites containing Nb2O5 for potential biomedical applications, showing increased hardness and elastic modulus with higher Nb2O5 content. Furthermore, nanoindentation simulation has been utilized to study material characteristics like elastic and plastic deformation in zirconia ceramic, demonstrating the technique's applicability for materials used in prosthetic restorations. Overall, a wide range of materials, from rocks to nanocomposites and ceramics, have been successfully evaluated using nanoindentation techniques.
Does doping induced stress in crystals?
5 answers
Doping in crystals can indeed induce stress, as evidenced by various studies. The introduction of dopant atoms, such as nitrogen or phosphorus, into crystal lattices alters material characteristics, leading to residual stress. For instance, nitrogen doping in SiC changes the lattice spacing, causing stress during crystal growth. Similarly, phosphorus doping affects the crystallization-induced stress in silicon thin films, with the final stress depending on the dopant concentration. The uneven distribution of dopants can significantly impact residual stress and deformation in released silicon structures. Moreover, laser-induced shock waves have been shown to facilitate doping of CdTe crystals. Understanding and managing doping-induced stress are crucial for the development of micro- and nanosystems technology and semiconductor devices.
What are the potential benefits and drawbacks of using laser powder bed fusion in reactive atmospheres for manufacturing?
5 answers
Laser powder bed fusion (LPBF) in reactive atmospheres offers benefits like enhanced material properties through controlled chemical reactions and improved part quality due to reduced oxidation during processing. However, challenges include the need for specialized equipment to maintain the reactive environment and the risk of unwanted reactions altering material properties. LPBF in reactive atmospheres can lead to the formation of unique microstructures and mechanical properties in printed parts, especially when considering the effects of printing parameters and post-processing treatments. Understanding the sensitivity of LPBF processes to variations in reactive atmospheres is crucial for optimizing part quality and performance, as variations in gas composition can significantly impact the final properties of the manufactured components.
Are there studies about the effects of lanthanides on the ISG glasses in the literature?
5 answers
Studies have indeed been conducted on the effects of lanthanides on glasses, including ISG glasses. For instance, research has explored the impact of lanthanum oxide (La2O3) on various glass systems, showing changes in properties such as thermal expansion, glass transition temperature, crystallization behavior, and structural stability. Additionally, investigations on lanthanum oxide-doped glasses have highlighted improvements in density, molar volume, and other physical parameters as the La2O3 content increases, affecting electrical and dielectric properties. Furthermore, the behavior of ISG glasses under irradiation, including alpha self-irradiation and external irradiation with heavy ions, has been studied to understand structural evolution and chemical durability, shedding light on the effects of irradiation on glass properties and structure.
What are the current trends in the use of aerogels in industrial applications?
4 answers
Current trends in the industrial application of aerogels indicate a growing interest in various sectors. Silica aerogels, known for their exceptional properties, are primarily utilized in thermal insulation, with emerging applications in electric vehicles and building insulation. Additionally, aerogels made from biopolymers like nanocellulose are gaining attention in bone tissue engineering, offering mimicry of the extracellular matrix and drug delivery capabilities for tissue healing and growth. Furthermore, the use of aerogels in construction for energy-saving purposes is on the rise, with applications in building insulation through aerogel glass, mortar, felt, and coatings being prominent. The versatility of aerogels, spanning from thermal insulation to biomedical applications, showcases a promising future for their industrial utilization.
What are the current advancements in reactive metal additive manufacturing technology?
5 answers
Reactive metal additive manufacturing technology has seen significant advancements in recent years. Studies have shown that by utilizing reactive gas atmospheres during the additive manufacturing process, it is possible to tailor the structure, composition, and mechanical properties of the manufactured components. Additionally, the field of metal additive manufacturing has been rapidly evolving, with a focus on laser additive manufacturing techniques that have found applications in various industrial sectors. Furthermore, the integration of additive manufacturing with traditional techniques like milling and casting, known as hybrid manufacturing, has shown promise in overcoming limitations such as mass production constraints and surface quality issues in metal additive manufacturing. These advancements pave the way for enhanced control over material properties and the production of complex geometries in metal additive manufacturing processes.