Concepts in Physical Metallurgy

Lavakumar, Avala

doi:10.1088/978-1-6817-4473-5

Cited by 11 publications

(11 citation statements)

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“…The volume fractions of the phases are 𝜈 𝑆𝑖𝐶 for SiC grains, 𝜈 𝑆𝑖 for residual Si, and 𝜈 𝐶 for residual carbon, which were estimated from the phase compositions shown later in Section 3.2. The densities of the phases are as follows: 𝜌 𝑆𝑖𝐶 = 3.21 g/cc, 41 𝜌 𝑆𝑖 = 2.33 g/cc, 42 𝜌 𝐶 = 2.27 g/cc. 43…”

Section: Thermal Conductivity and Thermal Diffusivitymentioning

confidence: 99%

Reliability comparisons between additively manufactured and conventional SiC–Si ceramic composites

Chaugule,

Du,

Kamath

et al. 2024

J Am Ceram Soc.

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An additively manufactured reaction‐bonded silicon carbide ceramic composite is fabricated using a bimodal powder feedstock and the binder‐jetting printing technique. On fabricating, the ceramic is investigated to report its composition, mechanical, and thermal properties at room temperature and high temperatures (up to 750). The ceramic has a density of 2.76 g/cc, and shows a hardness of 21.74 GPa, and a flexure strength of 207.5 MPa at room temperature. The mechanical property of flexure strength is used to estimate its failure probability under applied stress, using a Weibull distribution. The mechanical properties and failure probabilities are compared with those of conventionally fabricated reaction‐bonded silicon carbide ceramics reported in the literature. These ceramics were fabricated using methods such as slip‐casting, compacting, and tape‐casting. The comparison is used to elucidate the advantages and areas of improvement of the present additive manufacturing technique for reaction‐bonded ceramics.

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Section: Thermal Conductivity and Thermal Diffusivitymentioning

confidence: 99%

Reliability comparisons between additively manufactured and conventional SiC–Si ceramic composites

Chaugule,

Du,

Kamath

et al. 2024

J Am Ceram Soc.

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“…The results indicate the presence of Fe (96.41%) as the major component and Ca (1.70%), Mn (1.67%) and Cr (0.22%) in less proportion. The role of manganese is to improve the hardness, whereas chromium increases the resistance to corrosion and oxidation [33].…”

Section: Relative Transmissionmentioning

confidence: 99%

Characterization of black slags obtained during smelting in the electric arc furnace from SIDERPERU following reduction

et al. 2022

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The primary process in an electrical arc furnace (EAF) during industrial steelmaking results in tons of black slags which cause pollution to the environment. In this work, the iron oxides of black slags generated in the EAF from the SIDERPERU plant, Peru was reduced via the carbothermal reaction. The reduction of the black slag to α-Fe is demonstrated by X-ray diffraction, Mӧssbauer spectroscopy and magnetometry. However, phases with calcium and silicon persist in the sample after the carbothermal process. The thermodynamic calculations of the most probable reactions sequence were performed to understand the reduction process. The magnetometry measurements confirm the presence of ferromagnetic domains, supporting the success of the reduction of the black slag to α-Fe. The reduced black slags were recycled into a HRB335 steel rod by consolidation and extrusion processes and inspected by X-ray fluorescence.

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“…In fact, strength of Ti6Al4V alloy can be increased with an increase in β stabilizer content, which further improves its fatigue limit. However, the major concern of using Ti6Al4V alloy in clinics is the presence of vanadium in its chemistry, which can potentially increase the expressions of pro-inflammatory factors, cause osteolysis, exhibiting toxic effect in the body [11]. (Fig.1.2b).…”

Section: Why Titanium and Titanium Alloys For Orthopedic Applications?mentioning

confidence: 99%

Anodization of titanium alloys for orthopedic applications

İzmir

Ercan

2018

Front. Chem. Sci. Eng.

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, 90 pages In recent years, nanostructured oxide films on titanium alloy surfaces have gained significant interest due to their electrical, catalytic and biological properties, leading to an extensive effort to engineer nanostructured oxide films on titanium and titanium alloy surfaces. In literature, there is a variety of different approaches to fabricate nanostructured oxide films, including hydrothermal treatment, sol-gel synthesis, physical vapor deposition, electrodeposition, and etc. Among these methods, electrochemical fabrication processes have widely been explored due to their flexibility to control surface morphology at the micronscale and nanoscale. Anodization technique, which allows fine-tuning of oxide film thickness, feature size, topography and chemistry, is the most popular electrochemical approach to fabricate nanostructured oxide films on titanium alloys, and has been investigated for orthopedic and biomedical applications by multiple research groups. Briefly, anodization is the growth of a controlled oxide film on the surface of a metallic component attached to the anode of an electrochemical cell. This thesis explores the use of anodization of titanium alloys for orthopedic applications. vii In this thesis, micropit structures were grown on Ti6Al4V surfaces via anodization using fluoride free electrolytes consisting of NH4Cl in distilled water. Furthermore, nanotubular structures were fabricated via anodization of Ti6Al7Nb surfaces in fluoride electrolyte. Fabricated surface structures were characterized for their physical and chemical properties and the bioactivity of the surfaces were determined by soaking samples in simulated body fluid up to 30 days. The thesis concludes with areas requiring further research to successfully translate anodized titanium alloys to clinics for orthopedic applications.

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Concepts in Physical Metallurgy

Cited by 11 publications

References 0 publications

Reliability comparisons between additively manufactured and conventional SiC–Si ceramic composites

Reliability comparisons between additively manufactured and conventional SiC–Si ceramic composites

Characterization of black slags obtained during smelting in the electric arc furnace from SIDERPERU following reduction

Anodization of titanium alloys for orthopedic applications

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