Jet Fuel Thermal Stability - Report of Group on High-Temperature Stability of Fuels for High-Performance Aircraft, Aviation Fuel, Lubricant, and Equipment Research Committee of the Coordinating Research Council, Inc.

1962 ◽  
Author(s):  
C. T. Stone
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
High Performance ◽  
Research Council ◽  
Temperature Stability ◽  
Jet Fuel ◽  
Aviation Fuel ◽  
High Temperature Stability ◽  
Research Committee ◽  
High Performance Aircraft

High Temperature Stability of SiC/Ti Interface

2011 ◽  
Vol 685 ◽  
pp. 340-344 ◽  
Author(s):  
Tung Wai Leo Ngai ◽  
Chang Xu Hu ◽  
Wei Zheng ◽  
Heng Xie ◽  
Yuan Yuan Li
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Composite Materials ◽  
Temperature Stability ◽  
Diffusion Path ◽  
Interfacial Stability ◽  
Diffusion Couples ◽  
High Temperature Stability ◽  
High Temperature Structural Material ◽  
Thermal Stability Of

Ti, SiC and their composite materials have been widely used as high temperature structural material. The knowledge of interfacial stability between SiC and Ti is vital in high temperature applications. In this study, SiC/Ti diffusion couples were prepared to investigate the interfacial reactions between SiC and Ti at 1273 K. Phase forming sequence, microstructure and thermal stability of SiC/Ti interface were studied. It was indicated that after annealed at 1273 K for 10 days, 4 reaction layers were formed at the SiC/Ti interface. The diffusion path between SiC and Ti is SiC/Ti3SiC2/Ti5Si3/Ti5Si3+TiC/Ti3Si/Ti. As the annealing time prolong, the thicknesses of these reaction layers increased.

High-performance, high-temperature piezoelectric BiB3O6 crystals

2015 ◽  
Vol 3 (2) ◽  
pp. 329-338 ◽  
Author(s):  
Fapeng Yu ◽  
Qingming Lu ◽  
Shujun Zhang ◽  
Hewei Wang ◽  
Xiufeng Cheng ◽  
...  
Keyword(s):  
High Temperature ◽  
High Performance ◽  
Piezoelectric Properties ◽  
Temperature Stability ◽  
Piezoelectric Sensor ◽  
High Temperature Stability ◽  
Sensor Applications

BiB3O6 crystals possess large piezoelectric coefficients and high-temperature stability of their piezoelectric properties, which is promising for piezoelectric sensor applications.

scholarly journals Thermal Stability of Pepper Leaf Extracts

HortScience ◽  
2004 ◽  
Vol 39 (4) ◽  
pp. 855A-855
Author(s):  
Jeff Anderson*
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Tissue Concentration ◽  
Temperature Stability ◽  
High Temperature Stability ◽  
Leaf Extracts ◽  
Acute Heat Stress ◽  
Dependent Change ◽  
Time Dependent Change ◽  
Thermal Stability Of

Acute heat stress can denature and aggregate proteins. The objective of this study was to determine how changes in the chemical and physical environment affected high temperature-induced turbidity and precipitation in pepper (Capsicum annuum L.) leaf extracts. High temperature stability of leaf extracts decreased as the tissue concentration increased. Control extracts exhibited a time-dependent change in resistance to turbidity and precipitate development, but the presence of polyvinylpolypyrrolidone stabilized the extracts. Ethylenediamine-tetraacetic acid had a less marked effect on turbidity and precipitation. Solution thermal stability increased as buffer pH increased from pH 6.0 to 7.0 regardless of whether the pH was adjusted before or after tissue extraction. Mannitol strongly stabilized pepper leaf extracts, but a surfactant lowered the thermal stability.

Thermal stability of TiSi2 films on single crystal and polycrystalline silicon

1991 ◽  
Vol 6 (7) ◽  
pp. 1502-1511 ◽  
Author(s):  
Krishna Shenai
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Single Crystal ◽  
Polycrystalline Silicon ◽  
Temperature Stability ◽  
Process Variations ◽  
Titanium Silicide ◽  
High Temperature Stability ◽  
Crystal Silicon ◽  
Thermal Stability Of

The stability of selectively formed TiSi2 films on single crystal and polycrystalline silicon layers at elevated process temperatures is reported. Extensive electrical and analytical studies were performed to understand the high-temperature stability of TiSi2 films as a function of (i) substrate dopant concentration, (ii) titanium silicide thickness, (iii) silicide formation sequence, and (iv) silicide post-processing steps. It is shown that all four process variations have a profound influence on the thermal stability of TiSi2 films. It is observed that titanium silicide films formed on single crystal silicon are stable at higher processing temperatures compared to those formed on polysilicon substrates under similar conditions. The degradation of high-temperature stability of TiSi2 films on polycrystalline silicon can be related to increased number of defects and grain boundaries. It is shown that TiSi2 films can be successfully used in silicon integrated circuit applications where the post-silicide processing temperatures do not exceed 1000 °C.

Thermal Stability of Nanoscale Multilayered ZrAlN/ZrB2 Coatings

2005 ◽  
Vol 107 ◽  
pp. 137-140 ◽  
Author(s):  
D.J. Li ◽  
J.J. Zhang ◽  
Ming Xia Wang
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Partial Pressure ◽  
Layer Structure ◽  
Temperature Stability ◽  
Substrate Bias ◽  
High Temperature Stability ◽  
Dc Magnetron Sputtering ◽  
Hardness Values ◽  
Thermal Stability Of

Multilayered ZrAlN/ZrB2 coatings were synthesized using a multi-cathode dc magnetron sputtering technique. Effects of substrate bias and N2 gas partial pressure on structural, mechanical properties, as well as thermal stability were investigated. Low bias was beneficial to synthesis of nanolayers with weak internal stress. The nanolayers deposited at lower N2 partial pressure and substrate bias exhibited good high-temperature stability in the crystalline and layer structure, and hardness values were increased significantly after high-temperature annealing.

scholarly journals Applications of polyimide coatings: a review

2021 ◽  
Vol 3 (3) ◽  
Author(s):  
Ayse Sezer Hicyilmaz ◽  
Ayse Celik Bedeloglu
Keyword(s):  
High Temperature ◽  
High Performance ◽  
Temperature Stability ◽  
High Strength ◽  
Electronics Industry ◽  
High Tech ◽  
Nanofiber Membrane ◽  
High Temperature Stability ◽  
Production Methods ◽  
Polyimide Coating

AbstractPolyimides, high-performance polymers with superior properties such as high temperature stability, resistance to solvents and high strength, can be used in high-tech applications of the aerospace and aviation, medical or electronics industry in different forms (film, fiber, nanofiber, membrane, foam, adhesive or coating). Among these applications, coating has a special place and is used to develop advanced structures having high temperature resistance, flame retardancy and etc. for high tech industries via an economical and feasible way. Therefore, in this review, we aimed to report the broad application status of polyimide coatings by reviewing publications, patents and commercial products. Thus, this study can assist in selecting suitable polyimide types and production methods for polyimide coating applications and in understanding their applicability for future products.

High Temperature Stability of MGC’s Gas Turbine Components in Combustion Gas Flow Environments

2005 ◽  
Author(s):  
Narihito Nakagawa ◽  
Hideki Ohtsubo ◽  
Kohji Shibata ◽  
Atsuyuki Mitani ◽  
Kazutoshi Shimizu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Gas Flow ◽  
Temperature Stability ◽  
High Temperature Strength ◽  
High Temperature Stability ◽  
Exposure Test ◽  
Excellent Thermal Stability ◽  
Combustion Gas ◽  
Flow Environment

Melt growth composites (MGCs) have a unique microstructure, in which continuous networks of single-crystal phases interpenetrate without grain boundaries. Therefore, the MGCs have excellent high-temperature strength characteristics, creep resistance, oxidation resistance and thermal stability in an air atmosphere at very high temperature. In order to investigate the recession behavior of MGCs in combustion gas flow environment, we have just started the exposure tests to evaluate the influence of combustion gas flow environment on MGCs. The MGCs have about 95% of the initial flexural strengths after the exposure test for 10 hours at T = 1500 °C, P = 0.1–0.3 MPa, V = 150–250 m/s, PH2O = 15–45 kPa in the combustion gas flow environment. MGCs have excellent thermal stability and water vapor resistance in comparison with conventional ceramic materials such as Si3N4 and Al2O3 under the high temperature combustion gas flow environment.

Improvement of Thermal Stability of ZrO2-SiO2 Aerogel Modified by Ca(II) Cations

2018 ◽  
Vol 281 ◽  
pp. 105-110 ◽  
Author(s):  
Hang Yuan Zhao ◽  
Xiao Lei Li ◽  
Jian He ◽  
Zhi Peng Hu ◽  
Hui Jun Yu
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Calcium Nitrate ◽  
Temperature Stability ◽  
Secondary Phase ◽  
Ethanol Solution ◽  
Hydroxyl Groups ◽  
High Temperature Stability ◽  
Excellent Thermal Stability ◽  
Surface Hydroxyl

Ca (II) modified ZrO2-SiO2 aerogel (CaZSA) with excellent thermal stability at 1000 °C was prepared by aging the ZrO2-SiO2 wet gel in calcium nitrate (Ca (NO3)2) ethanol solution followed with alcohol supercritical fluid drying method. The reaction between surface hydroxyl groups on the aerogel and Ca (II) ions played an important role in reducing the high temperature activity and inhibiting the particle growth caused by the condensation of hydroxyl groups of aerogel. Moreover, tiny secondary-phase particles, Ca (II) ions, introduced along grain boundaries serve as the pinning particles to inhibit the crystallization of ZrO2-SiO2 aerogel (ZSA). Thus the high-temperature stability of ZSA was significantly improved by surface modification with Ca (II). The specific surface area of CaZSA still maintained 223 m2·g-1 after 1000 °C calcination, which was 52.7% higher than that of ZSA at the same treatment condition.

High Temperature Characteristics of Diamond SBDs

2010 ◽  
Vol 645-648 ◽  
pp. 1231-1234 ◽  
Author(s):  
Hitoshi Umezawa ◽  
Kazuhiro Ikeda ◽  
Ramanujam Kumaresan ◽  
Shinichi Shikata
Keyword(s):  
High Temperature ◽  
Schottky Barrier ◽  
Barrier Height ◽  
High Performance ◽  
Experimental Studies ◽  
Temperature Stability ◽  
High Temperature Stability ◽  
Blocking Voltage ◽  
1D Model ◽  
Voltage Region

Because of the superior material properties of diamond, high performance in high-temperature power device application is demonstrated in both the computational and the experimental studies. A calculated Baliga limit of diamond Schottky barrier diode (SBD) based on 1D model indicates that an increase in on-resistance is highly expected within the high blocking voltage region and will be remarkable at high temperature conditions. Because of the high barrier height of diamond SBDs, the reverse leakage current is suppressed even at high temperatures. From the high-temperature stability test, stable interfaces of metal/diamond contact with constant Schottky barrier height have been confirmed. The SBD works for more than 1500 hrs at 400oC.

scholarly journals High Boron Content and Soluble Polyborosilazanes to Amorphous SiBCN Ceramics

2020 ◽  
Author(s):  
Qingqing Chen ◽  
Dechang Jia ◽  
Xingqi Liao ◽  
Zhihua Yang ◽  
Yu Zhou ◽  
...  
Keyword(s):  
High Temperature ◽  
High Performance ◽  
Boron Content ◽  
Synthesis Method ◽  
Temperature Stability ◽  
High Temperature Stability ◽  
One Pot ◽  
Temperature Resistance ◽  
High Boron ◽  
Ft Ir

Abstract To increase the content of boron in soluble polyborosilazanes (PBSZs) (the Si/B ratio should be less than 3), we introduce a successful one-pot synthesis method of a precursor by reaction with tris(dichloromethylsilylethyl)borane (TDSB), boron trichloride (BTC) and hexamethyldisilazane (HDMS) that satisfies the above conditions. The precursor was successfully transformed to SiBCN fibers by electrospinning technology. The resulting SiBCN ceramic material produced by the new route has high performance and high-temperature resistance against crystallization. Furthermore, we have analyzed the mechanism of the synthesis and ceramization of the new soluble precursor by NMR, FT- IR and TG- MS, and the high- temperature stability of the resulting SiBCN powder has been analyzed a by DTA, XRD and SEM.

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