High-performance resin-bonded magnets produced from zinc metal-coated Sm2(Fe0.9Co0.1)17Nx fine powders

1999 ◽  
Vol 75 (11) ◽  
pp. 1601-1603 ◽  
Author(s):  
K. Noguchi ◽  
K. Machida ◽  
K. Yamamoto ◽  
M. Nishimura ◽  
G. Adachi
Keyword(s):  
High Performance ◽  
Zinc Metal ◽  
Fine Powders ◽  
High Performance Resin

Star-shaped arylacetylene resins derived from silicon

2020 ◽  
Vol 40 (8) ◽  
pp. 676-684
Author(s):  
Niping Dai ◽  
Junkun Tang ◽  
Manping Ma ◽  
Xiaotian Liu ◽  
Chuan Li ◽  
...  
Keyword(s):  
High Performance ◽  
Room Temperature ◽  
Mechanical Test ◽  
Flexural Modulus ◽  
Mechanical Analysis ◽  
Reinforced Composites ◽  
Scanning Calorimetry ◽  
Chemical Structures ◽  
Structures And Properties ◽  
High Performance Resin

AbstractStar-shaped arylacetylene resins, tris(3-ethynyl-phenylethynyl)methylsilane, tris(3-ethynyl-phenylethynyl) phenylsilane, and tris (3-ethynyl-phenylethynyl) silane (TEPHS), were synthesized through Grignard reaction between 1,3-diethynylbenzene and three types of trichlorinated silanes. The chemical structures and properties of the resins were characterized by means of nuclear magnetic resonance, fourier-transform infrared spectroscopy, Haake torque rheomoter, differential scanning calorimetry, dynamic mechanical analysis, mechanical test, and thermogravimetric analysis. The results show that the melt viscosity at 120 °C is lower than 150 mPa⋅s, and the processing windows are as wide as 60 °C for the resins. The resins cure at the temperature as low as 150 °C. The good processabilities make the resins to be suitable for resin transfer molding. The cured resins exhibit high flexural modulus and excellent heat-resistance. The flexural modulus of the cured TEPHS at room temperature arrives at as high as 10.9 GPa. Its temperature of 5% weight loss (Td5) is up to 697 °C in nitrogen. The resins show the potential for application in fiber-reinforced composites as high-performance resin in the field of aviation and aerospace.

Manipulating the ion-transfer kinetics and interface stability for high-performance zinc metal anodes

2020 ◽  
Vol 13 (2) ◽  
pp. 503-510 ◽  
Author(s):  
Xuesong Xie ◽  
Shuquan Liang ◽  
Jiawei Gao ◽  
Shan Guo ◽  
Jiabao Guo ◽  
...  
Keyword(s):  
High Performance ◽  
Three Dimensional ◽  
Dendrite Growth ◽  
Side Reactions ◽  
Ion Transfer ◽  
Interface Stability ◽  
Zinc Metal ◽  
New Class ◽  
Kinetics Of ◽  
Metal Anodes

We report a new class of Zn anodes modified by a three-dimensional nanoporous ZnO architecture (Zn@ZnO-3D), which can accelerate the kinetics of Zn2+ transfer and deposition, inhibit dendrite growth, and reduce the side-reactions.

Facile Synthesis of ZnS/N,S Co-doped Carbon Composite from Zinc Metal Complex for High-Performance Sodium-Ion Batteries

2017 ◽  
Vol 10 (1) ◽  
pp. 704-712 ◽  
Author(s):  
Mingjun Jing ◽  
Zhengu Chen ◽  
Zhi Li ◽  
Fangyi Li ◽  
Mengjie Chen ◽  
...  
Keyword(s):  
Metal Complex ◽  
High Performance ◽  
Carbon Composite ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Facile Synthesis ◽  
Zinc Metal ◽  
Co Doped

Composite Materials Manufacturing Processes

2011 ◽  
Vol 110-116 ◽  
pp. 1361-1367 ◽  
Author(s):  
Mohammad Reza Khosravani
Keyword(s):  
Composite Materials ◽  
High Performance ◽  
Fiber Composite ◽  
High Strength ◽  
Commercial Aircraft ◽  
Carbon Fiber Composite ◽  
Advanced Composites ◽  
Space Reduction ◽  
High Performance Resin ◽  
Vehicle Components

— Using Composite materials are growing more and more today and we have to use them in possible situation. One of the Composite materials applications is on the Airplane and aero space. Reduction of Airplane weight and more adaptability with nature are examples of benefit of using composite materials in aerospace industries. In this article process of manufacturing of composite materials and specially carbon fiber composite are explained. Advance composite materials are common today and are characterized by the use of expensive, high-performance resin systems and high-strength, high-stiffness fiber reinforcement. The aerospace industry, including military and commercial aircraft of all types, is the major customer for advanced composites. Product range now includes materials for low pressure and low temperature. Some using composite materials in aero space are as follow: Satellite Components, Thin Walled Tubing for Aircraft and Satellites, launch vehicle components and honeycomb structures.

Fabrication of AlN Ceramics Using AlN and Nano-Y2O3 Composite Particles Prepared by Mechanical Treatment

2008 ◽  
Vol 403 ◽  
pp. 245-248 ◽  
Author(s):  
Daisuke Hiratsuka ◽  
Junichi Tatami ◽  
Toru Wakihara ◽  
Katsutoshi Komeya ◽  
Takeshi Meguro
Keyword(s):  
Fracture Toughness ◽  
High Performance ◽  
Mechanical Treatment ◽  
Composite Powder ◽  
Composite Particles ◽  
Green Body ◽  
Sintering Aids ◽  
Fine Powders ◽  
Electronic Substrates ◽  
Fractured Surface

AlN ceramics used in electronic substrates and packages are fabricated by the densification of green bodies with sintering aids such as rare-earth oxides. The homogeneous dispersion of the sintering aids, achieved with the help of the mechanochemical bonding of several types of fine powders, is the key process for obtaining a good sinterability and high performance. In this study, we fabricated the AlN ceramics using AlN and nano-Y2O3 composite particles prepared by mechanical treatment. The AlN powder and nano-Y2O3 powder were ball-milled with Al2O3 balls and a dispersant in ethanol in a plastic pot. The powder mixture of AlN and Y2O3 was composited by mechanical treatment. The composite powder was granulated and pressed to obtain a green body. After dewaxing, the AlN green body was fired at 1800°C in 0.6 MPa N2. The sintered body possessed a fracture toughness of 3.6 Pa•m1/2, higher than that, 3.1 Pa•m1/2, of the AlN ceramics fabricated without the mechanical treatment. An observation of the fractured surface revealed that grain boundary reinforcement enhances the fracture toughness of the AlN ceramics made of composite particles.

Curing behaviors and properties of epoxy and self-catalyzed phthalonitrile with improved processability

2017 ◽  
Vol 30 (6) ◽  
pp. 710-719 ◽  
Author(s):  
Mingli Jiang ◽  
Yangxue Lei ◽  
Xiaobo Liu
Keyword(s):  
High Performance ◽  
Curing Kinetics ◽  
Adhesive Property ◽  
Thermal Stabilities ◽  
Practical Applications ◽  
Low Viscosity ◽  
System Composition ◽  
High Performance Resin ◽  
Initial Processing ◽  
Gel Transition

The curing behaviors for high-performance resin system phthalonitrile-containing benzoxazine and epoxy (BA-Ph/EP), particularly the effect of the binary system composition and processing conditions on their processabilities were investigated and discussed in this article. Results indicated that all BA-Ph/EP prepolymers exhibited low initial processing viscosity (<0.3 Pa s) and have kept stable low viscosity until gel transition. The suitable molding temperature (ranged from 150°C to 180°C) and molding time (ranged from 20 min to 80 min) could be selected for practical applications of BA-Ph/EP systems. The studies of curing behaviors and gelatinization for BA-Ph/EP systems give further understanding of the curing kinetics and guidance for the fabrication of high-performance copolymers/polymers. The introduction of EP could significantly improve the cross-linking density of BA-Ph/EP polymers, and the appropriate content of EP is the key fact for the improvement. In addition, the effects of postcuring conditions on thermal properties and the adhesive property of BA-Ph/EP polymers were monitored. The thermal stabilities and adhesive property of various polymers also showed an obvious influence with the introduction of EP. The systematic study of BA-Ph/EP system could enable a broadened industrial application, especially in the areas that require high-temperature resistance.

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