Comparative study of high temperature oxidation behavior and mechanical properties of wire arc sprayed NiCr and NiAl coatings

This paper aims to consolidate the results of various researchers focusing the different applications, so that this paper could become the torch bearer for the futuristic researchers working in the domain of cold gas dynamics spray coating.,A study on the cold spray coating is presented by summarizing the data present in literature. Important factors such as coating temperature, pressure, coating thickness, particle size, which affect the erosion-corrosion (E-C) resistance, physical and mechanical properties of boiler steel are stated. This paper also addresses the use of cold spray coating and compares it with other different thermal spray processes.,From the literature review, it was noticed that cold spray technology is best as compare to other thermal spray processes to reduce porosity, increase hardness, adhesion strength and retention in properties of feedstock powders.,Cold spray coating technology has a great potential in almost every field especially in restoration of surfaces, generation of complex surface, biomedical application, resist hot corrosion, wear, oxidation and erosion corrosion.

Overview of cold spray coatings applications and comparisons: a critical review

ABSTRACT Cold spray is an emerging surface coating technology for rapidly developing thick coating, thin films and additive manufacturing of parts at relatively low temperatures. The low cost and scalability of a cold spray method make it promising for diverse industrial applications. Presently, the cold spray coating is widely used for the production of machine parts, materials and tools that requires the desired surface properties. However, the consideration of process parameters setting develops a reliable coating having high mechanical, tribological, fatigue and morphological properties for demanding coating applications. Hence, the aim of this paper is to study the effect of processing conditions (pressure and temperature of propellant gas, powder particle morphology and post-process treatments) on the tribological and mechanical properties of cold-sprayed coatings. Further, the effect of microstructure and processing conditions on the fatigue and static characteristics of cold spray material is also discussed.

Influence of processing conditions on the mechanical, tribological and fatigue performance of cold spray coating: a review

The aim of the current investigation is to evaluate the erosion-corrosion (E-C) performance of wire arc sprayed Ni-20Cr and Ni-5Al coatings on T22 and SA516 boiler steels in a real boiler environme...

Erosion corrosion behaviour and mechanical properties of wire arc sprayed Ni-Cr and Ni-Al coating on boiler steels in a real boiler environment

The aim of current investigation is to access in-vitro corrosion performance of flame sprayed titania (TiO2) coated 316L stainless steel, hydroxyapatite (HAp) coated, hydroxyapatite/titania bond coated (HAp/TiO2) 316L stainless steel and plasma sprayed zirconia (ZrO2) coated 316L stainless steel. In HAp/TiO2 bond coatings, TiO2 was utilize as a bond coat between the 316L stainless steel substrate and HAp top coat. The different characterization methods such as SEM, EDS, XRD and electrochemical methods were used to analyse the electrochemical characteristics as well as microstructural morphology phases of the coatings. In addition the corrosion behavior of the coated and uncoated samples was performed in simulated body fluid. The tests were carried out for potentio-dynamic polarization and open circuit potential. The experimental results reveal that after the deposition of bond coatings (HAp, TiO2, ZrO2 and HAp/TiO2) the corrosion resistance of the steel was observed to increase.

Corrosion performance of hydroxyapaite and hydroxyapaite/titania bond coating for biomedical applications

Human-Computer Interaction (HCI) is the area of intersection between psychology and the social sciences. HCI assists companies in creating technological products accessible to individuals with disabilities. In addition, HCI helps user experience (UX) designers and other professionals understand each user's requirements relating to technology. This paper aims to give an overview of the concept of Human-Computer Interaction. The overview comprises basic definitions, frameworks, goals, and types of HCI. It also includes a voice user interface and sociophonetics in HCI. Finally, Norman's model of interaction and future scope are discussed.

An extensive overview on Human-Computer Interaction (HCI) application

Data is a more basic resource for all associations than at any other time in recent memory. Recent advances and models such as sensor platforms, IoT, distributed computing, and information exploration make it possible for the inevitable, skilled, and real collection of information. Information security and protection are essential for information to be used to its full potential. Despite the fact that information security and protection have been mostly considered during the last few years, today it is faced with new and unpleasant problems in information security and protection. Part of these difficulties arises from security concerns about the use of information and from the need to combine security with the use of information for security in applications such as national insurance, counter-terrorism and well-being, food, and water security. Various difficulties arise due to the fact that the organization of a new set of data and processing devices, for example, used in the IoT, increases the information attack surface. This paper reviews the significant ideas and approaches to information security, protection and identifies the research challenges that should be addressed with comprehensive solutions to information security and privacy questions.

Overview of data security, classification and control measure: a study

One of the most significant classes of engineering materials in the modern period is Metal Matrix Composites(MMCs). In recent years, MMCs have attracted a lot of attention. MMCs are displacing traditional metallic materials in the automobile and aerospace industries owing to their numerous advantageous characteristics, which include low weight, high specific strength, good wear resistance, enhanced resistance to creep, etc. MMCs aid in improving the functionality of industrial parts without adding extra weight to the system. Despite the fact that several distinct types of MMCs have been created over the years, aluminum and magnesium MMCs have emerged as the most promising materials in the aerospace and automotive fields due to their improved tribological performance, low weight, and excellent mechanical properties. However, there are a number of factors that are divided into three categories that affect the tribological behavior of these MMCs, including the reinforcement material (volume fraction, reinforcement type, shape), the operating conditions (sliding speed, normal load), and the environmental conditions (relative humidity and temperature). This study seeks to give a thorough review of the history, categorization, materials, and applications in many fields, as well as the distinct tribological and corrosion behavior of the Al/Mg MMCs under various situations. To pave the way for future researchers working in these sectors, it also outlines the methods and properties used in the study.

Corrosion and wear behavior of metal matrix composites

Universal human values (UHV) play a significant role in the whole life of a human being. These values in the education system are necessary to create effective students who will bring the nation to greater height. However, the present education system just focuses on acquiring large amounts of information, passing examinations and procuring many higher degrees for the job. Thus, the people after getting the job only focus on earning more money, while giving less importance to relationship and right understanding. This results in number of problems at individual levels (depression, anxiety, stress, suicides, etc.), family level (breaking up of joint families, divorce, dowry, deaths etc.) and society level (growing incidence of terrorism, violence, communism, racial and ethnic struggle, wars and sex crimes etc.). Hence, this paper advocates about the basis of human values and the issues that the students face before learning the value based education and the positive changes that happens after understanding of value based education. This leads to technically skilled and morally strong professionals and even helps in enhancing more opportunities in their life.

Importance of universal human values in education system: An overview

Additive Manufacturing (AM) is an emerging technology, used to fabricate components in layer by layer fashions. It has several key merits such as part customization, ability to produce complicated shapes etc. that are not possible by traditional machining methods (Lathes, Shapers, Planner, Slotter, Milling etc.). The timeline of the scientific and technological developments survey reported that owing to the attractive properties and growing demand it will be used to fabricate full body origin in 2032. This paper aims to provide an overview of additive manufacturing methods, materials, merits and demerits, cost comparision, future scope, challenges and distinct industrial applications, so that this study helps upcoming researchers working in the field of additive manufacturing.

Comprehensive study on additive manufacturing process methods, cost comparision, challenges and industrial applications

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