Research & Development in Material Science最新文献

{"title":"Phase Relation Studies in the CeO2-Sm2O3 System at 1500 to 600 °C in Air","authors":"Andrievskaya Er, Kornienko Oa, Yurchenko Yu","doi":"10.31031/rdms.2020.12.000795","DOIUrl":"https://doi.org/10.31031/rdms.2020.12.000795","url":null,"abstract":"Introduction For many years, CeO2-based materials have been mainly used as catalysts and pigments in ceramics or glasses. Today ceria based materials are of great worldwide interest for many engineering applications such as catalysts, solid electrolytes, laser media, radio wave absorbers, components for electronics, and so on. Much attention is now focused on development of alternative power sources which are based on electrochemical devices, in particular on fuel cells. As solid electrolytes for fuel cells that operate at high temperatures (up to 1000 °С), materials on the basis of Y2O3 stabilized zirconia are used, whereas ceria based solid solutions are promising as electrolytes operating at moderate temperatures (tо 600 °С) [1-10].","PeriodicalId":20943,"journal":{"name":"Research & Development in Material Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75724975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metal Nanoparticles in Immunotherapy: Applications, Limitations and Pespectives","authors":"M. Dukhinova, M. Shestovskaya, A. Shtil","doi":"10.31031/rdms.2020.12.000793","DOIUrl":"https://doi.org/10.31031/rdms.2020.12.000793","url":null,"abstract":"Metal nanoparticles (NPs) functionalize numerous cell populations critical for combating cancer, bacterial and viral infections, parasites, etc. Essentially, among the target cells that encounter NPs are the immune cells, one of the first responders and transmitters of external signals in the organism. Heterogeneity of the immune cell populations complicate the systemic analysis and NPs adjustment for immunomodulation; also, severe complications should be taken into consideration since the cells can respond unpredictably to the treatment. Nevertheless, the application of NP in medicine is rapidly emerging, therefore the above limitations must be carefully addressed.","PeriodicalId":20943,"journal":{"name":"Research & Development in Material Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75834917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Sway of Effect Pulse Energies of LSP Pathways on AHSS-DP 350/600","authors":"Baidoo Philip","doi":"10.31031/rdms.2019.12.000789","DOIUrl":"https://doi.org/10.31031/rdms.2019.12.000789","url":null,"abstract":"Laser shock processing (LSP) is accountably novel material outward layer body modification technology. It employs high power laser to inflict a well-built hit wave on material outer body layer to refine the material structure and induce residual stress beneficially into outward appearance Cheng et al. [1] worked on the effects of LSP on Nano-hardness, elastic modulus and surface residual stress of Fe-Ni alloy and investigated. The importance of tiny-hardness and elastic modulus on Fe-Ni alloy after LSP were measured by the Nano indentation technology. The marked residual effort outward layer by XRD with sin2ψ and scanning electron microscopy (SEM) observation of the microstructure before and after LSP solutions were captured. Execute resulted that outer appearance of the tiny-hardness, elastic modulus and outward residual effort in LSP region, were obviously raised to a desirable point as against non-LSP region. Banderas et al. [2] emphatically alarmed on a paper the negative side of an absorbent overlay on the residual stress field using LSP setup and the energy level were evaluated. The Residual defects spread in multiples have a character of inner depth governed by the drilling behavior. It was seen that the overspread of residual stress move the write-about to a position changed on the outer side on the specimen. The prevention of coating the specimen surface after LSP have improved wear and contact fatigue properties of this aluminum alloy. Guan et al. [3] confirmed also in the work done on tiny-indentation used to handle measuring tiny films on mechanical properties, including elastic modulus and tiny-hardness. The pithy-hardness and elastic modulus samples manufacture have a series of effects by LSP during LY2 aluminum alloy worked. The outcome of the result shown Nanoindentation techniques values increased by 58.13% and 61.74% as compared to non-LSP. LPS improved metal mechanical strength which governed fatigue property and corrosion resistance were alarmed. Hill et al. [4] investigated that the advance-cycle fatigue feats in accordance with 7085-T7651 aluminum treated with a sample of LSP and anodization. The Stress-feats and fatigue-data were ignited in a high-level humidity environment which used smooth (Kt = 1) specimens test at a stress ratio (R= 0.1). This resulted that shocked specimens chanced-out higher significant improvement in fatigue performance. Crimson Publishers Wings to the Research Research Article","PeriodicalId":20943,"journal":{"name":"Research & Development in Material Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78021748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of the Compression Resistance of a Geopolymer Based Composite with Added Jute Fiber","authors":"G. Lopes, Vicente Paes, João dos Santos, L.M.M. Alves","doi":"10.31031/rdms.2019.12.000788","DOIUrl":"https://doi.org/10.31031/rdms.2019.12.000788","url":null,"abstract":"The preservation of the environment is a very important topic that has been gaining adherents after the industrial revolution. Global warming, burning, melting glaciers, climate change, pollution and major natural disasters in general are some examples of impacts that have raised the concern of large groups of people about the world we live in. Therefore, it is necessary to identify the actions and products used that contribute to this degradation and look for alternatives to reduce the risks to the planet, aiming to improve harmony with nature in the present and in the future. In construction, concrete is one of the most widely used substances in the world and requires large amounts of Portland cement, which produces large amounts of carbon dioxide (CO2). Thus, with this very significant detriment to the environment, comes the importance of innovative and alternative ways of substituting this material [1]. Geopolymers appear as an alternative option that not only offers less risk to the environment, but also has good mechanical properties that make them a building material of great need for future study and projection [2]. The production of the geopolymers is through a reaction composed of a solid phase, called precursor, and a liquid phase, known as activator [3]. The precursor is characterized by reactive aluminosilicate materials, frequently used metakaolin and fly ash. The activator is composed of an alkaline solution, usually sodium hydroxide (NaOH) or potassium hydroxide (KOH). In general, regardless of the aluminosilicate material used, the macroscopic characteristics of the product will be similar [4]. Geopolymeric cement is a mixture based on polysiloxosialate, which is an aluminosilicate (Al-Si-O), sodium, potassium and calcium (Na, K, Ca-PSS) compound and has high mechanical strength, durability and surface hardness [3]. Based on the composition and aggregates used, it is able to acquire other properties such as higher initial resistance [2], chemical resistance and refractoriness [4]. The use of fibrous reinforcement in geopolymer composites aims to obtain better properties for composites [5]. Due to their low cost and easy production, natural fibers began to be more researched, aiming to provide better properties for the material [6].","PeriodicalId":20943,"journal":{"name":"Research & Development in Material Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81623244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Blockchain is Boundless and Exciting, but we Have to Keep Both Feet on the Ground","authors":"J. Veuger","doi":"10.31031/rdms.2019.12.000787","DOIUrl":"https://doi.org/10.31031/rdms.2019.12.000787","url":null,"abstract":"","PeriodicalId":20943,"journal":{"name":"Research & Development in Material Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80255714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antioxidant Activity of Leaf Extract of Calotropis Procera Tree in Alkufra City","authors":"N. Aali","doi":"10.31031/rdms.2019.12.000786","DOIUrl":"https://doi.org/10.31031/rdms.2019.12.000786","url":null,"abstract":"Calotropis procera, Apocynaceae, belongs to the family Asdepiadaceae, It occurs in most parts of the tropical world, in dry sandy and alkaline soils, in waste land and grows abundantly as a weed [1], Calotropis gigantea is Worldwide known by various names such as swallowwort, dead-sea apple, sodom apple or milk weed. It has been widely used in the Sudanese, Unani, Arabic and Indian traditional medicinal system for the treatment of various diseases namely leprosy, ulcers, piles and diseases of the spleen, liver and abdomen [2]. Calotropis procera, a wild growing plant of family Asclepiadaceae, is well known for its medicinal properties. Different parts of this plant have been reported to exhibit anti-inflammatory, analgesic, and antioxidant properties. It is found in most parts of the world in dry, sandy and alkaline soils and warm climate and is more common in south western and central India and western Himalayas. It is found in waste lands and grows as a weed in agricultural lands. In ancient Ayurvedic medicines the plant Calotropis procera was known as “Rakta arka” [3]. Medicinally important parts of this plant are flower, terminal leaf pairs, root with root bark and latex. Out of that the most significant part which drew attention of researchers is latex because of its medicinal properties, economic use for cheese and rubber production. Latex contain majority of hydrocarbon contents have established this plant as a source of bio-energy. The plant also shows good antibacterial activity 3M, all parts of the plant exude white latex when cut or broken. The latex contains a range of toxic compounds. These toxins are believed to have a role in the plant’s defence against insects, mites and pathogens [4]. The latex has been reported to comprise chitinases, proteinases and anti-oxidative enzymes [5]. Calotropis species is used for the treatment of bronchitis, pain, asthma, leprosy, ulcers, piles, spleen, tumors, liver, abdomen and dyspepsia; it is also used frequently for cold, fever, diarrhea, rheumatism, indigestion, eczema and jaundice. Different parts of the plant were used for the treatment of several diseases such as stem for skin disease, intestinal worms, leprosy, leucoderma; the roots are used for the treatment of leprosy, asthma, cough, elephantiasis, rheumatism and diarrhea; latex and leaves are used for swelling and joint pain; oil massage can be used for paralyzed part; juice of Calotropis was used for purgation [6].","PeriodicalId":20943,"journal":{"name":"Research & Development in Material Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77594513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Links Between Mechanical Properties and Local Atomic Structures of Cu–Zr Bulk Metallic Glasses","authors":"S. Jekal","doi":"10.31031/rdms.2019.12.000785","DOIUrl":"https://doi.org/10.31031/rdms.2019.12.000785","url":null,"abstract":"Bulk metallic glasses (BMGs) have drawn much attention due to their interesting mechanical properties such as extraordinary elastic strain limits and a high tensile yield stress [1-6]. For example, their yield strengths can be up to 1 to 5GPa and elastic strain limits up to ~2% [7-10]. However, their use for engineering applications has been challenging since BMGs exhibit localized strain softening leading to failure and brittleness. The underlying atomicscale plastic mechanisms are believed to be mediated by a local microscopic mechanism [11-14]. Such localized processes have been observed during high-strain deformation atomistuc simulations [15-22] inspiring the development of the shear transformation zone (STZ) concept and the effective temperature theory of athermal glass plasticity [23-25].","PeriodicalId":20943,"journal":{"name":"Research & Development in Material Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88151168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Titanium Oxide and their Effects on Structure, Physical Properties and Electrochemical Corrosion Parameters of Alloys","authors":"Abu Bakr El Bediwi","doi":"10.31031/rdms.2019.12.000784","DOIUrl":"https://doi.org/10.31031/rdms.2019.12.000784","url":null,"abstract":"Materials are so significant in the development of civilization. Almost no metals are used in pure form, but they are always combined with each other to recover one or more properties. An alloy may be defined as a substance that has the metallic properties and is composed of two or more chemical elements of which at least one is a metal. Most alloys are great importance in industry and in the arts than are the pure metals. Several researches reported that, modification structure by adding alloying elements to tin or bismuth-based alloys caused minor/ or major effects on measured physical properties such as elastic modulus, hardness, meting temperature, internal friction, spreading, resistivity and electrochemical corrosion behavior with corrosion parameters [1-17]. Microstructure, mechanical and thermal properties of bismuth or tin based alloys are studied [18-23] studied at different conditions. Matrix structure of these alloys is changed which effects on all measured physical properties.","PeriodicalId":20943,"journal":{"name":"Research & Development in Material Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77311261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Anode Catalyst Development for Direct Formic Acid Fuel Cell","authors":"T. Tsujiguchi","doi":"10.31031/rdms.2019.12.000783","DOIUrl":"https://doi.org/10.31031/rdms.2019.12.000783","url":null,"abstract":"","PeriodicalId":20943,"journal":{"name":"Research & Development in Material Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76900159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Libra and Anxiety Rhetoric: Fear to be Eaten","authors":"J. Veuger","doi":"10.31031/rdms.2019.12.000782","DOIUrl":"https://doi.org/10.31031/rdms.2019.12.000782","url":null,"abstract":"","PeriodicalId":20943,"journal":{"name":"Research & Development in Material Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81927676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}