Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Thermoelectric materials that are efficient well above ambient temperature are needed to convert waste-heat into electricity. Many thermoelectric oxides were investigated for this purpose, but their power factor (PF) values were too small (∼10−4 W m−1 K−2) to yield a satisfactory figure of merit zT. Changing the anion…
This review addresses current and future perspectives of nanogel technology for nanomedicine. The synthetic methodologies and material properties of nanogels prepared by chemical meanings are discussed in detail, and examples that illustrate the different methodologies are presented. Applications in the fields of drug…
The formation of hybrids of nanofibrillated cellulose and titania nanoparticles in aqueous media has been studied. Their transparency and mechanical behavior have been assessed by spectrophotometry and nanoindentation. The results show that limiting the titania nanoparticle concentration below 16 vol% yields homogeneo…
Equal Channel Angular Pressing (ECAP) is currently one of the most popular methods for fabricating Ultra-Fine Grained (UFG) materials. In this work, ECAP process has been performed on commercial pure aluminum up to 8 passes by route A. After verification of FEM work, the influences of four die channel angles, three ou…
Abstract This review article focuses on recent advances and challenges in the field of thermotropic cubic phases of the bicontinuous type (Cub bi ) formed by low molecular mass molecules. In the Cub bi phases, the constituent molecules self‐organize into 3D network structures, although local molecular diffusional moti…
The inhibition effect of exudate gum from Acacia trees (Gum Acacia, GA) on the corrosion of mild steel in acidic media was studied by weight loss, hydrogen evolution, and electrochemical polarization methods; also, surface morphology was analyzed by Fourier transform infrared spectroscopy (FTIR), scanning electron mic…
The T-bar rheometrical tool (Brookfield Engineering Laboratories, Inc.) is a slender rod which is placed in a material and rotated horizontally about its short axis by a vertical shaft. The torque on the shaft from laminar flow of material around the rod is determined by the material’s rheological properties. T-bar ex…
Control of food or bolus flow properties is part of several strategies to address aspiration pneumonia in dysphagic patients. An important alternative is the use of prescribed ready-to-use (RTU) oral nutritional supplements (ONS) specially designed for the nutritional support at different stages of dysphagia. However,…
In order to obtain quasicrystalline (QC) phase by mechanical alloying (MA) in the Al-Cu-Fe system, mixtures of elementary Al, Cu and Fe in the proportion of 65-20-15 (at. %) were produced by high energy ball milling (HEBM). A very high energy type mill (spex) and short milling times (up to 5 hours) were employed. The…
A combination of an extension of the topological instability "λ criterion" and the "average electronegativity" has been recently reported in the literature to predict compositions with high glass-forming ability (GFA). In the present work, both criteria have been applied to select the Ni61.0Nb36.0B3 alloy with a high…
در این تحقیق، بازیافت پرههای مستعمل توربین از جنس اینکُنل 738 بهروش ESR درون یک قالب مسی با آبگرد بررسی شده است. با استفاده از سربارهی مناسب و افزودن آلومینیم فلزی، ترکیب اصلی آلیاژ بدون تغییر حفظ شد، و میزان گازهای اکسیژن، هیدروژن و نیتروژن در حد قابل قبولی قرار گرفت. برای بررسی تأثیر ذوب مجدد با سربارهی الکتریک…
فلز آلومینیم نسبت به واکنش اکسایش بسیار حساس است، بهگونه ای که هر گاه سطح مذاب آن در معرض هوا قرار گیرد بهسرعت اکسید شده و یک لایهی اکسیدی بر روی آن تشکیل می شود. لایهی اکسیدی تشکیل شده در زمان بارریزی دارای ضخامتی کم و سطوحی چینخورده است. در نتیجهی تلاطم مذاب و تاخوردن لایهی اکسیدی بر روی آن، لایهی اکسیدی دوت…
ایجاد پوششی از نیکل بر روی سطح ذرات پودری نیترید بُر هگزاگونال می تواند مشکل عدم ترشوندگی آنها در ساخت مادهی مرکب را برطرف کند. در این پژوهش، با تغییر شرایط در مراحل آمادهسازی یعنی اکسایش، حساسسازی و فعالسازی، تأثیر آنها بر ایجاد رسوب نیکل بر روی سطح ذرات نیترید بُر بررسی شده است. مطالعات انجام شده با میکروسکپ ا…
با گسترش فناوری نانو و کاهش اندازهی ذرات تقویت کنندهی سرامیکی تا مقیاس نانومتری، خواص مکانیکی مواد مرکب بهمیزان چشمگیری افزایش یافته است. بهدلیل پایین بودن هزینهی تولید، سادگی فرایند تولید و سهولت کنترل ساختار زمینه، ریخته گری مواد مرکب زمینه آلومینیمی مورد توجه قرار گرفته است. در این تحقیق، رفتار پیرسختی نانوما…
The effect of minor additions of Gd and Sm on the glass-forming ability (GFA) of Cu-Zr-Al alloys is investigated here. The rationale for these additions is the fact that the atomic size distribution can increase GFA by changing the topology of the alloy as a function of cluster stability, which is tied to the electron…
The influence of polymeric dispersants containing different functional groups on the suspension behaviour of titania pigment slurry was investigated. The dispersants chosen were polyacrylic acid and modified polyacrylamides including homo and copolymers modified with carboxylate and/or hydroxyl groups. The pigment slu…
In this work, the effect of C4+ and Cl4+ ion irradiation with 25 MeV energy on the hardness and shear banding feature of Ti40Zr25Be30Cr5 bulk metallic glass was studied. Depth-sensing nanoindetation and microindentation were applied for characterizing the multiple-scaled hardness and shear band patterns during plastic…
Surface tailoring with plasma transferred arc (PTA) hardfacing involves the deposition of powder mixtures to produce coatings with an almost unlimited chemical composition. PTA hardfacing is particularly important for processing low weldability alloys, such as those for high-temperature applications, of which NiCrAlC…
Ti-6Al-7Nb alloys are being evaluated for biomedical applications, in substitution of the more conventional Ti-6Al-7V. Both types of alloys present a microstructure containing the α and the β phases, which result in good compromise for mechanical applications. In the present work Ti-6Al-7Nb alloys were processed by Hi…