Study of Film Layer Structure and Resistance on High Strength Room Temperature Blackening

In this paper, the high strength room temperature blackening film on steel surface were prepared, the structure and the forming principle of the film were studied. The procedure of the Cu-Se-P system high strength composition blackening was researched, and the factors that affect the wear resistance of the film were analyzed [1]. The experiment shows that the procedure have many virtues, such as short treatment time, high efficiency, low cost, high adhesive strength, perfect wear resistance, which posed a new approach for blackening of machine parts.

Download Full-text

Sintering and Hot-Pressing of Ti2AlC Obtained by SHS Process

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.63.282 ◽

2010 ◽

Vol 63 ◽

pp. 282-286 ◽

Cited By ~ 7

Author(s):

Leszek Chlubny ◽

Jerzy Lis ◽

Mirosław M. Bućko

Keyword(s):

Hot Pressing ◽

High Efficiency ◽

Layer Structure ◽

Low Cost ◽

Max Phases ◽

Fine Powders ◽

High Temperature Synthesis ◽

Low Energy Consumption ◽

Potential Applications ◽

Xrd Method

Some of ternary materials in the Ti-Al-C system are called MAX-phases and are characterised by heterodesmic layer structure. Their specific structure consisting of covalent and metallic chemical bonds influence its semi-ductile features locating them on the boundary between metals and ceramics, which may lead to many potential applications, for example as a part of a ceramic armour. Ti2AlC is one of this nanolaminate materials. Self-propagating High-temperature Synthesis (SHS) was applied to obtain sinterable powders of Ti2AlC Utilization of heat produced in exothermal reaction in adiabatic conditions to sustain process until all substrates are transformed into product is one of the advantages of the method that result in low energy consumption and low cost combined with high efficiency. Different substrates were used to produce fine powders of ternary material. Phase compositions of obtained powder were examined by XRD method. Than selected powders were used for sintering in various temperature both in a presureless sintering and hot-pressing in argon atmosphere. Properties and phase composition of obtained products were examined.

Download Full-text

The Application of New High-Strength Polyester Fiber Flexible Net for the End Coal Mining Through

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.750-752.2141 ◽

2013 ◽

Vol 750-752 ◽

pp. 2141-2144

Author(s):

Qi Tao Duan ◽

Guo Yin Shang ◽

Zhu He Xu ◽

Xi Wen Zhang

Keyword(s):

High Efficiency ◽

Low Cost ◽

Cutting Speed ◽

High Strength ◽

Mining Area ◽

Polyester Fiber ◽

Construction Technology ◽

Metal Mesh ◽

Working Face ◽

Mesh Material

Shendong mining area hanging nets adopted metal mesh material in the traditional through of fully mechanized coal face. Whose defects were the high cost of materials, process cumbersome, great labor intensity and time consuming. Therefore, new high-strength polyester fiber flexible mesh material was introduced. Its main advantages are: light weight, tensile resistance and drag force strong, flame-retardant and anti-static, low cost, simple process, high efficiency, coal cutting speed. The construction technology process in detail were designed which contained flexible network transported, fixed, dropped and raised. The project was implemented in Shigetai Coal at the end of No.12401 mining face. Results show that from working face mounting network to smoothly through with only 40 hours, compared with the traditional metal net can save 44 hours and cost 480000 yuan.

Download Full-text

Fatigue Property of High-Strength Carbon Steel Deformed by Repetitive Side Extrusion Process

Materials Science Forum ◽

10.4028/www.scientific.net/msf.475-479.245 ◽

2005 ◽

Vol 475-479 ◽

pp. 245-248 ◽

Cited By ~ 2

Author(s):

Koshiro Aoki ◽

Akira Azushima ◽

Yoshiyuki Kondo

Keyword(s):

Heat Treatment ◽

Carbon Steel ◽

Room Temperature ◽

Lateral Pressure ◽

Treatment Time ◽

Fatigue Property ◽

High Strength ◽

Extrusion Process ◽

Ultrafine Grained ◽

Better Than

The development of an ultrafine grained carbon steel during repetitive shear deformation of side extrusion and the properties after heat treatment were investigated. Side extrusions were carried out at room temperature and the used material was 0.50% carbon steel. The repetitive side extrusions with a constant lateral pressure were carried out up to 3 passes without rotation. The specimens of these steels after 3 passes were annealed at a constant temperature of 600°C changing the treatment time. After side extrusion and heat treatment, the fatigue property was better than that of the as-received material.

Download Full-text

Towards hydrogen detection at room temperature with printed ZnO nanoceramics films activated with halogen light

Additional Conferences (Device Packaging HiTEC HiTEN & CICMT) ◽

10.4071/cicmt-wp13 ◽

2015 ◽

Vol 2015 (CICMT) ◽

pp. 000224-000229 ◽

Cited By ~ 1

Author(s):

Van Son NGUYEN ◽

Véronique JUBERA ◽

Alain GARCIA ◽

Claude LUCAT ◽

Hélène DEBEDA

Keyword(s):

Room Temperature ◽

Uv Light ◽

Layer Structure ◽

Low Cost ◽

Halogen Lamp ◽

Gas Sensitivity ◽

Excitation Spectra ◽

Light Power ◽

Hydrogen Detection ◽

Halogen Light

Though semiconducting properties of ZnO have been extensively investigated under hazardous gases, research is still necessary for low-cost sensors working at room temperature. Study of printed ZnO nanopowders based-sensor has been undertaken for hydrogen detection. A ZnO paste made with commercial nanopowders is deposited on interdigitated Pt electrodes and sintered at 400°C. ZnO layer structure and morphology are first examined by XRD, SEM and emission/excitation spectra prior to the study of the effect of UV-light on the electrical conduction of the semiconductor oxide. Then, the response to hydrogen shows that low UV-light provided by a halogen light enhances gas sensitivity and allows detection at room temperature with sensitivity equivalent to those obtained in dark condition at 150°C. A sensitivity S≈44% is obtained for 300 ppm hydrogen at room temperature under halogen lamp illumination whereas a sensitivity S≈38% is measured at 150°C in the dark. Moreover, it is demonstrated that very low UV-light power (15 μW/mm2) provided by the halogen lamp is sufficient to give sensitivities as high as those obtained with UV LED (7.7 mW/mm2). These results are comparable to those obtained for 1 or 2D ZnO nanostructures working at room temperature or at temperature until 250 °C.

Download Full-text

A Study on Injection Molding Analysis and Structural Analysis with Truck Brake Pedal

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.535-536.430 ◽

2013 ◽

Vol 535-536 ◽

pp. 430-433

Author(s):

Chul Woo Park ◽

Seong Ho Seo

Keyword(s):

Injection Molding ◽

High Efficiency ◽

Low Cost ◽

Fem Simulation ◽

High Strength ◽

Injection Molding Process ◽

Brake Pedal ◽

Molding Process ◽

Molding Condition ◽

Plastic Parts

Injection molding process one of the most important methods to produce plastic parts with high efficiency and low cost. Today, Injection molded parts have been increased dramatically the demand for high strength and quality applications. In this study, truck brake pedal is made of Cast iron and plastic materials to replace the frame for the optimization process that minimizes the runner and the gate dimension will determine the size and shape. Runner and gate dimensions of change based on availability of the product. I will discuss the injection molding. This report investigates that the optimum injection molding condition for minimum of runner and gate position. The FEM Simulation CAE tool, MOLDFLOW, is used for the analysis of injection molding process.

Download Full-text

Low-Cost Air Gap Metasurface Structure for High Absorption Efficiency Energy Harvesting

International Journal of Antennas and Propagation ◽

10.1155/2019/1727619 ◽

2019 ◽

Vol 2019 ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

Wei Hu ◽

Zhao Yang ◽

Fading Zhao ◽

Guangjun Wen ◽

Jian Li ◽

...

Keyword(s):

High Efficiency ◽

Layer Structure ◽

Low Cost ◽

Single Layer ◽

Absorption Efficiency ◽

Air Gap ◽

Wireless Power ◽

Low Loss ◽

Dielectric Substrates ◽

High Absorption

This manuscript deals with the design of a metamaterial-based surface structure for high efficiency wireless power harvesting or collection. Differently from the previously presented structures which require the use of thicker and low-loss (and for this reason high cost) dielectric substrates, the presented work employs a dual-layer structure with a thin low-loss material and an air gap; they allow for the design of very high absorption efficiency metamaterial-based surfaces, with noticeably reduced costs. Furthermore, the air gap thickness can be used as a new degree-of-freedom (more easily adjustable than the thickness of a single-layer structure) for the optimization of other design requirements such as bandwidth or structure sizes. In comparison with other existing designs, the proposed metasurface shows a comparable absorption efficiency of 84.4% but with a larger power collection surface and lower costs.

Download Full-text

Bromide Induced Room‐Temperature Formation of Photoactive Formamidinium‐Based Perovskite for High‐Efficiency, Low‐Cost Solar Cells (Solar RRL 4∕2019)

Solar RRL ◽

10.1002/solr.201970045 ◽

2019 ◽

Vol 3 (4) ◽

pp. 1970045

Author(s):

Xinding Lv ◽

Xuemei Dong ◽

Zhili Ye ◽

Junshuai Zhou ◽

Fei Deng ◽

...

Keyword(s):

Solar Cells ◽

Room Temperature ◽

High Efficiency ◽

Low Cost

Download Full-text

(?m 10.6) Design study for Reserve of laser CO2

Baghdad Science Journal ◽

10.21123/bsj.11.2.560-563 ◽

2014 ◽

Vol 11 (2) ◽

pp. 560-563

Author(s):

Baghdad Science Journal

Keyword(s):

Total Energy ◽

Co2 Laser ◽

Room Temperature ◽

High Efficiency ◽

Low Cost ◽

Optical Design ◽

The Other ◽

Receiver System ◽

Normal Error ◽

Focal Shift

In this paper , the CO2 laser receiver system is designed and studied, with wavelength laser 10.6 ?m in room temperature , and to evaluate the performance and discussion it via the package of optical design (ZEMAX), from its output the Spot Diagram is measured through RMS ,and from the Ray fan plot , the aberrations is found which is the normal error for the best focus named (under corrected ) , the other output was the Geometric Encircled Energy in the spot diagram . and found that the radius of spot diagram at 80% (R80%) from the total energy ,and focal shift .The designed system have high efficiency and low cost .

Download Full-text

Tensile Properties of Cast and Hot Isostatic Pressurized Ti-6Al-4Fe-xSi Alloys

Materials Science Forum ◽

10.4028/www.scientific.net/msf.449-452.689 ◽

2004 ◽

Vol 449-452 ◽

pp. 689-692

Author(s):

E.H. Kim ◽

Hi Won Jeong ◽

Seung Eon Kim ◽

Yong Taek Hyun ◽

Yont Tai Lee ◽

...

Keyword(s):

Mechanical Properties ◽

High Temperature ◽

Tensile Properties ◽

Room Temperature ◽

Precipitation Hardening ◽

Low Cost ◽

High Strength ◽

Alloy System ◽

High Temperature Mechanical Properties ◽

Better Than

A new high strength titanium alloy system with low cost alloying elements, such as Al, Fe, has been recently developed. In present study the expensive V was replaced with Fe, and Si was added from 0 to 7.5wt.%. The effect of Fe and Si on the microstructure and tensile properties of Ti-6Al-4Fe-xSi (x=0, 0.1, 0.25, 0.5, 0.75wt.%) alloys was investigated. The room and high temperature mechanical properties of Ti-6Al-4Fe alloys were better than those of the Ti-6Al-4V. It was mainly due to the phase boundary strengthening at ambient and high temperature. The strength and elongation of the developed alloys depended upon the Si contents. The Si elements made the grain boundary and colony size fine, and increased the strength of the developed alloys by solid solution and precipitation hardening. The tensile strength variation with the Si contents at room temperature and 400°C, and at 450°C and 500°C showed a similar behavior, respectively.

Download Full-text