Evaluating Wear Performance of Silicon Nitride-Hexagonal Boron Nitride Composite Using Taguchi Method | Chapter 1 | Research Aspects in Chemical and Materials Sciences Vol. 2

The goal of bio-tribology research is to determine which biomaterials will wear the least. Recently, silicon nitride (Si3N4) has been suggested as a substitute material for hip and knee joint replacement. Hexagonal boron nitride can be used to improve Si3N4's wear characteristics (hBN).

Methods/Analysis: In order to reduce wear loss, this study evaluates the sliding wear behaviour of Si3N4-hBN composite against alumina and steel (ASTM 316L). The impact of hBN addition on Si3N4 wear performance was investigated. The trials were designed using the Design of Experiments (DoE) - orthogonal array Taguchi approach to assess the impact of the addition of hBN on the silicon nitride material's wear properties.

Findings: Taguchi analysis recommends 15N load and 8 percent volume of hBN against alumina and 15N load and 12 percent volume of hBN against steel to reduce Si3N4 wear loss. The relationship between load and hBN addition has a significant impact on silicon nitride's wear resistance.

 

Author (s) Details

Sachin Ghalme

Department of Mechanical Engineering, Sandip Institute of Technology and Research Centre, Nashik (MS), India.

 

View Book :-  https://stm.bookpi.org/RACMS-V2/article/view/7625

Possible Nature of Electrical Conductivity of the Corund-Graphene Composite: A Recent Study | Chapter 11 | Research Developments in Science and Technology Vol. 7

 The study looks at how sintering modes affect the electrical conductivity of corundum-graphene composites. The characteristics of the electrically conductive structure and its production circumstances are supported by evidence. The goal of this study is to learn more about the nature of conducting structure creation after receiving a corundum-graphene composite and to support the necessity to continue previous research in this area.

Author(s) Details:

A. G. Zholnin,
The State University of Land Use Planning SULUP, Kazakova str., 105064, Moscow, Russia.

R. S. Hafizov,
The State University of Land Use Planning SULUP, Kazakova str., 105064, Moscow, Russia.

Please see the link here: https://stm.bookpi.org/RDST-V7/article/view/7103

Experimental Investigation on the Characterization of HA/Alumina and HA/mgo Nanocomposites for Orthopedic Applications| Chapter 12 | Issues and Developments in Medicine and Medical Research Vol.11

 For the first time, HA/Alumina and HA/MgO nanocomposites were effectively produced at 250°C utilising the hydrothermal technique. In HA/Alumina and HA/MgO nanocomposites, the mechanisms of composite production, crystallite size, crystallinity, and shape were investigated. An intermolecular interaction between HA/Alumina and HA/MgO was discovered using XRD and FTIR techniques. The nature of the formation of HA/Alumina and HA/MgO nanocomposites is polycrystalline. The addition of magnesium to HAP promotes osteoblast growth. During the early phases of osteogenesis, magnesium functions like a growth factor, promoting bone production. TEM analysis confirmed it. HAP/Alumina was generated in a short nanorod shape, and HA/MgO nanocomposites have a nanocluster-like morphology, according to TEM images. The suitable vibrational spectra of HA/Alumina and HA/MgO nanocomposites can be seen using FTIR. The band–gap of HA/Alumina and HA/MgO nanocomposites is visible in UV–VIS experiments. This discovery lays the groundwork for future studies on HA/Alumina and HA/MgO nanocomposites for biomedical applications.

Author(s) Details:

V. Vijayalakshmi,
Erode Sengunthar Engineering College, Erode, India.


N. S. Mohan,
Erode Sengunthar Engineering College, Erode, India.

Please see the link here: https://stm.bookpi.org/IDMMR-V11/article/view/6084

Bauxite Mining Industry in Guinea and the Valorization Prospects of the Resulting Residue for Engineering Purposes | Chapter 8 | Novel Perspectives of Engineering Research Vol. 4

 Because of the importance and diversity of its natural riches, Guinea is recognised as a geological disaster. Experts, regardless of the grading system, utilise superlatives to highlight the country's tremendous potential. Guinea has 33 percent of the world's known bauxite reserves, according to several geological surveys. The way a deposit's content is defined is inconsistent, and the ideas and definitions are muddled up in different statistics data. As a result, when evaluating distinct bauxite resources, an expert must be aware of the terminologies in use and change his evaluation accordingly. The large bauxite potential presents a significant chance for the country to become a global leader in the bauxite and aluminium industries, as well as create red mud value-adding prospects. The bauxite potential and local alumina industry in Guinea, as well as the technology utilised to evaluate the resulting red mud, are discussed in this article. Guinea's largest direct contribution to GDP comes from the bauxite and alumina sector.

Author(S) Details

Diaka Sidibé
Institut des Mines et Géologie, Boké, Guinea.

Ahmed A. Konaté
Institut des Mines et Géologie, Boké, Guinea.

Oumar B. Kaba
Institut des Mines et Géologie, Boké, Guinea.

Sékou Traoré
Polytechnic Institute, University of Conakry, UGANC, Guinea.

View Book:- https://stm.bookpi.org/NPER-V4/article/view/5108

Thermo Catalytic Decomposition of Methane over Cu - Al2O3 and 5 - 20wt% Ni - Cu - Al2O3 Catalysts to Produce Hydrogen and Carbon Nanofibers: Experimental Investigation | Chapter 4 | Recent Trends in Chemical and Material Sciences Vol. 4

 Hydrogen is an environmentally beneficial fuel with the potential to reduce the use of fossil fuels greatly; yet, it faces numerous important difficulties before it can be widely adopted. TCD (thermo catalytic decomposition of methane) is one of the most useful strategies for fulfilling future demand and, as a result, an appealing approach for COx-free hydrogen synthesis, which is necessary in fuel cells. The combustion of fossil fuels produces a large amount of greenhouse gases such as carbon dioxide, nitrogen oxides, and sulphur oxides. We attempted to create hydrogen utilising Cu-Al2O3 and 5, 10, 15, and 20% wt% Ni modified Ni/Cu-Al2O3 catalysts in this study. Cu-Al2O3 catalysts with 5 wt percent Ni/Cu-Al2O3 catalysts with 20 wt percent Ni/Cu-Al2O3 catalysts with 15 wt percent Ni/Cu-Al2O3 catalysts with 10 wt percent Ni/Cu-Al2O3 catalysts with 10 wt percent Ni/Cu-Al2O3 catalysts with 10 wt percent Ni/Cu-Al2O3 catalysts with 10 It has been discovered that increasing the nickel loadings in Ni/Cu-Al2O3 improves the efficiency of thermo catalytic methane breakdown. The 10wt% Ni/Cu-Al2O3 catalyst has the best catalytic activity of the five produced catalysts. Carbon nanofibers are seen in SEM pictures of catalysts after methane thermocatalytic breakdown. Cu-Al2O3 and 5,10,15, and 20% Ni/Cu-Al2O3 catalysts' XRD patterns exhibited highly crystalline peaks, which could explain the improved catalytic life and production of carbon nanofibers. With a 10wt% Ni/Cu-Al2O3 catalyst, a 70 percent hydrogen production rate was recorded, and hydrogen carbon fibres were discovered, which can be employed as catalyst support.

Author(S) Details

K. Srilatha
ACE Engineering College, Ankushapur, Ghatkesar, Medchal - Malkajgiri District, Hyderabad-501301, Telangana, India.

View Book:- https://stm.bookpi.org/RTCAMS-V4/article/view/4796

Study on Composite Solid Electrolyte Systems: Theory and Materials | Chapter 3 | Research Trends and Challenges in Physical Science Vol. 2

 Electrical qualities of materials have supported our convenient everyday existence since the discovery of electricity, and "electrical conduction" has been one of the most important properties of materials. In materials, there are two types of electrical conduction: electronic conduction, which uses electrons or holes as charge carriers, and ionic conduction, which uses ions as charge carriers. Superionic conductors, often known as solid electrolytes, are a class of materials that have ionic conductivity similar to strong liquid electrolytes despite being solid. Solid electrolytes provide several advantages over liquid electrolytes, including the lack of liquid containment and leakage issues, the ability to use highly reactive electrodes over a larger temperature range, and the ability to miniaturise utilising thin-film processing techniques. Because of the ever-increasing need for superionic conductors, solid state ionic is currently a focus area. The most extensively used approach for preparing superionic conductors is a direct reaction in the solid state known as solid state reaction. Though solid state reactions have long been recognised, it has only been in the last few decades that researchers have focused their efforts both experimentally and conceptually on uncovering the secrets of crystal atomic structures and reactivity.

Author(S) Details

Mora Veera Madhava Rao
Department of Physics, Osmania University, Hyderabad, India.

View Book:- https://stm.bookpi.org/RTCPS-V2/article/view/4489

Influence of Technology of Nanopowder Production on the Microstructure of the Sintered by Spark-Plasma Material | Chapter 11 | Recent Trends in Chemical and Material Sciences Vol. 1

A comparison of the Spark-Plasma Sintering (SPS) results of two types of aluminium oxide nanopowders generated through conductor explosion and plasma synthesis. The qualities of the resulting compacts are notably different in mechanical properties and microstructure when the parameters of both powders are similar (spherical form of the particles, size, phase composition), as well as SPS modes. Technological impurities in powders obtained by different procedures are the cause of discrepancies in the qualities of the resultant compacts. Impurities contained in nanopowder created by electro explosion of conductor were artificially added to powder made by plasma synthesis and not containing these impurities, revealing their effect on the creation of the microstructure and characteristics of the sintered by SPS method sample.

Author (s) Details

Dr. A. G. Zholnin
National Research Nuclear University "MEPhI", 115409 Moscow, Kashirskoye Highway, 31, Russia.

Dr. A. P. Melekhov
National Research Nuclear University "MEPhI", 115409 Moscow, Kashirskoye Highway, 31, Russia.

Dr. R. S. Hafizov
State University of Land Management, 105064 Moscow, Kazakova Street 15, Russia.

S. A. Vakulenko
National Research Nuclear University 'MEPhI', 115409 Moscow, Kashirskoye Highway, 31, Russia.

N. A. Rubinkovskiy
National Research Nuclear University 'MEPhI', 115409 Moscow, Kashirskoye Highway, 31, Russia.

A. V. Samokhin
Federal State Institution of Science Institute of Metallurgy and Materials Science of A.A. Baikov of Academy of Sciences (RAS IMET), Russia.

N. V. Alekseev
Federal State Institution of Science Institute of Metallurgy and Materials Science of A.A. Baikov of Academy of Sciences (RAS IMET), Russia.

E. G. Grigoryev
National Research Nuclear University 'MEPhI', 115409 Moscow, Kashirskoye Highway, 31, Russia.

View Book :- https://stm.bookpi.org/RTCAMS-V1/article/view/2188