Relevant bibliographies by topics / HF cavity

Academic literature on the topic 'HF cavity'

Author: Grafiati
Published: 30 May 2022
Last updated: 31 May 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'HF cavity.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "HF cavity"

1

Neugebauer, Petr, and Anne-Laure Barra. "New Cavity Design for Broad-Band Quasi-Optical HF-EPR Spectroscopy." Applied Magnetic Resonance 37, no. 1-4 (November 16, 2009): 833–43. http://dx.doi.org/10.1007/s00723-009-0092-5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Donaldson, L., and A. Frankland. "Ultrastructure of iodine treated wood." Holzforschung 58, no. 3 (May 12, 2004): 219–25. http://dx.doi.org/10.1515/hf.2004.034.

Full text
Abstract:
Abstract Iodine staining has been used to study the orientation of cellulose microfibrils in wood using light microscopy. The aim of this work was to understand the exact nature of the staining reaction with iodine and to provide insight into the properties and organisation of the wood cell wall. Based on transmission electron microscopy it is apparent that precipitation of the iodine following treatment with nitric acid results in the formation of crystal cavities within the cell wall, which follow the orientation of the cellulose microfibrils. There is no evidence that iodine precipitates within “drying checks” as previously speculated. High resolution confocal reflectance microscopy of crystal cavity orientation indicates that the microfibril arrangement within pit borders can be both spiral and circular. Crystal cavities are much more abundant within the S1 layer than elsewhere. All of the cells examined had crystal cavities in the S1 region, which may be related to the reduced lignification at the S1/S2 boundary resulting in greater porosity of the cell wall at this location. Within the S2 region, clusters of crystal cavities are randomly distributed and occur in widely varying numbers among adjacent cell walls, suggesting variations in the porosity of the S2 wall within and among adjacent tracheids. Cavities form preferentially within more electron lucent regions of the cell wall. The random nature of crystal cavity formation within S2 clusters probably reflects the underlying random nature of the cell wall nanostructure. We conclude that iodine staining can provide important clues to the nanostructural properties of tracheid cell walls.
APA, Harvard, Vancouver, ISO, and other styles
3

Zhang, Yuanhai, Xingang Wang, Yuezhen Liu, Xinhua Jiang, Chunjiang Ye, Liangfang Ni, Liping Zhang, Jianfen Zhang, Bin Xu, and Chunmao Han. "Management of a Rare Case With Severe Hydrofluoric Acid Burns: Important Roles of Neutralizers and Continuous Renal Replacement Therapy." International Journal of Lower Extremity Wounds 16, no. 4 (November 13, 2017): 289–95. http://dx.doi.org/10.1177/1534734617736198.

Full text
Abstract:
Hydrofluoric acid (HF), a dangerous inorganic acid, is widely used in various industries and in daily life. Chemical burns caused by HF exposure occur more frequently in some regions worldwide. It has been reported that some cases with HF burns can be lethal due to the hypertoxicity of HF. In this article, we present a case of a 24-year-old worker who suffered HF burns by 53% HF solution to his face, neck, and nasal cavity. This patient quickly developed electrolyte disturbance, that is, hypocalcemia, and hypopotassemia, and myocardial injury after exposure. Multiple measures had been taken to treat this patient, including fluid resuscitation, electrolyte replacement, timely wound treatment with neutralizers, and respiratory tract care. Moreover, continuous renal replacement therapy was also employed to remove fluoride in the circulatory system and rectify the electrolyte disturbance and acid-base imbalance. The patient smoothly pulled though and survived. High fluoride levels in the dialysate solution were confirmed, indicating that continuous renal replacement therapy is an effective and potentially lifesaving treatment for acute HF poisoning.
APA, Harvard, Vancouver, ISO, and other styles
4

Li, Wanju, Minghui Liu, Hankun Wang, and Yan Yu. "Fabrication of highly stable and durable furfurylated wood materials. Part II: the multi-scale distribution of furfuryl alcohol (FA) resin in wood." Holzforschung 74, no. 12 (November 18, 2020): 1147–55. http://dx.doi.org/10.1515/hf-2019-0287.

Full text
Abstract:
AbstractThe aim of this investigation was mainly to evaluate the multi-scale distribution of furfuryl alcohol (FA) resin in modified Chinese fir and poplar wood. 13C CP/MAS NMR, Scanning Electron Microscopy (SEM), Confocal Laser Scanning Microscopy (CLSM), Nanoindentation and Imaging Fourier transform infrared microscopy (Imaging FT-IR) were applied to describe the FA resin distribution in wood from bulk to cell wall scale. The results showed that FA resin were mainly located in the cell cavity of Chinese fir tracheids. For poplar, FA resin was mostly deposited in the cavity of fibers and ray cells, while little was found in the adjacent vessels. Lots of pits of wood cells were covered with FA resin which implied a higher risk of drying after wood furfurlation in practical production. Nanoindentation demonstrated that FA resin could easily infiltrate into the wood cell wall because both reduced modulus and hardness of the modified wood cell walls were significantly improved. This conclusion was further supported by the results of imaging FT-IR.
APA, Harvard, Vancouver, ISO, and other styles
5

Civiš, Svatopluk, Zdeněk Zelinger, Václav Nevrlý, Andrei Dorogan, Martin Ferus, Vladimir Iakovlev, Alexei Sirbu, et al. "Near-infrared wafer-fused vertical-cavity surface-emitting lasers for HF detection." Journal of Quantitative Spectroscopy and Radiative Transfer 147 (November 2014): 53–59. http://dx.doi.org/10.1016/j.jqsrt.2014.05.010.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Jiang, Z. H., Z. Chen, B. H. Fen, Z. Q. Hou, and G. H. Chen. "Modeling Ovendry Softwood Resistivity Based on the Resistor Network Theory." Holzforschung 57, no. 4 (June 26, 2003): 415–20. http://dx.doi.org/10.1515/hf.2003.061.

Full text
Abstract:
Summary This study develops a method to theoretically calculate ovendry softwood resistance and resistivity based on block transformation theory. The resistance of a single cell was calculated as the sum of a combination of serial and parallel connections of the two end cell walls, four side cell walls and cell cavity. One cell was considered as a resistor, and the wood as a network of single cell resistors. Resistance was calculated for a group of four resistors. After several iterations, the total resistance of wood was obtained. To test the model, experiments were conducted on Masson pine specimens. The resistances of fifty specimens were measured and their resistivities calculated. A comparison of the theoretical calculations and the measured results revealed a difference between the measured average resistivity of specimens and the model calculations of less than 8%. The resistivity of softwood was found to relate to the size of wood cells, amount of ray cells and the percentage of latewood.
APA, Harvard, Vancouver, ISO, and other styles
7

Demko, I. V., L. I. Pelinovskaya, A. Yu Kraposhina, V. E. Selin, A. E. Ryazanov, Ya I. Verigo, and V. A. Mosina. "Case of lifetime diagnosis of isolated primary amyloidosis of the heart." Kardiologiia 62, no. 1 (January 31, 2022): 106–8. http://dx.doi.org/10.18087/cardio.2022.1.n1049.

Full text
Abstract:
The article presents a case of intravital diagnosis of a rare heart disease, isolated primary amyloidosis. The clinical onset of the disease was heart failure (HF) that was resistant to treatment; chemotherapy was ineffective and was poorly tolerated by the patient. The diagnostics was based on a combination of refractory HF and changes in echocardiography data (atrial dilatation, small size of the left ventricular cavity, interventricular septal hypertrophy with the presence of hyperechoic inclusions of the “granular fluorescence” type), and changes detected by contrast-enhanced cardiac magnetic resonance imaging. The diagnosis of amyloidosis was confirmed by results of pathohistological examination of the material obtained during autopsy.
APA, Harvard, Vancouver, ISO, and other styles
8

Journal, Baghdad Science. "Comparison of HF and HCl Chemical Laser Parameters by using Mathematical Model." Baghdad Science Journal 4, no. 1 (March 4, 2007): 119–24. http://dx.doi.org/10.21123/bsj.4.1.119-124.

Full text
Abstract:
A simplified theoretical comparison of the hydrogen chloride (HCl) and hydrogen fluoride (HF) chemical lasers is presented by using computer program. The program is able to predict quantitative variations of the laser characteristics as a function of rotational and vibrational quantum number. Lasing is assumed to occur in a Fabry-Perot cavity on vibration-rotation transitions between two vibrational levels of hypothetical diatomic molecule. This study include a comprehensive parametric analysis that indicates that the large rotational constant of HF laser in comparison with HCl laser makes it relatively easy to satisfy the partial inversion criterion. The results of this computer program proved their credibility when compared with the little published data.
APA, Harvard, Vancouver, ISO, and other styles
9

Covasa, Mihai, Jeremy K. Marcuson, and Robert C. Ritter. "Diminished satiation in rats exposed to elevated levels of endogenous or exogenous cholecystokinin." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 280, no. 2 (February 1, 2001): R331—R337. http://dx.doi.org/10.1152/ajpregu.2001.280.2.r331.

Full text
Abstract:
Rats maintained on a high-fat (HF) diet exhibit reduced sensitivity to the satiation-producing effect of exogenous CCK. Because more CCK is released in response to HF meals than low-fat (LF) meals, we hypothesized that increased circulating CCK associated with ingestion of HF diets contributes to the development of decreased CCK sensitivity. To test this hypothesis, we implanted osmotic minipumps filled with either NaCl or CCK octapeptide into the peritoneal cavity. Subsequently, we examined the effect of intraperitoneal NaCl or CCK (0.5 μg/kg) injection on 30-min food intake. CCK significantly reduced 30-min food intake less in rats implanted with CCK-releasing minipumps compared with those with NaCl-releasing minipumps. Because dietary protein is a potent releaser of endogenous CCK, we hypothesized that rats adapted to a high-protein (HP) diet might also exhibit reduced sensitivity to exogenous CCK. Therefore, in a second experiment, we examined CCK-induced reduction of food intake in rats maintained on LF and rats maintained on HF or HP. Ingestion of LF stimulates very little endogenous CCK secretion, whereas both HF and HP markedly increase plasma CCK concentrations. Both doses of CCK reduced food intake significantly less in HF and HP rats compared with LF rats. There were no differences in 24-h food intake, body weight, or body fat composition among LF-, HF-, and HP-fed rats. These results are consistent with the hypothesis that sustained elevation of CCK either by infusion of exogenous CCK or by dietary-induced elevation of plasma CCK contributes to the development of reduced sensitivity to exogenous CCK.
APA, Harvard, Vancouver, ISO, and other styles
10

Donaldson, Lloyd, Jamie Hague, and Rebecca Snell. "Lignin Distribution in Coppice Poplar, Linseed and Wheat Straw." Holzforschung 55, no. 4 (June 21, 2001): 379–85. http://dx.doi.org/10.1515/hf.2001.063.

Full text
Abstract:
Summary Lignin distribution was determined by interference microscopy, and by confocal laser scanning microscopy (CLSM) for a range of agricultural residues including coppice poplar, linseed, and wheat straw. Interference microscopy was used to determine the lignin concentration in the middle lamella at the cell corner, and for the secondary wall of libriform fibres in the secondary xylem of poplar and linseed. Wheat was examined in the same way for cortical fibres. In addition the secondary wall of vessel elements was examined for poplar. Confocal microscopy was used to confirm the results from interference microscopy by providing semiquantitative information based on lignin autofluorescence, and by staining with acriflavine. Wheat had the lowest level of lignification, with 31 % lignin in the middle lamella of cortical fibres and 9% lignin in the secondary wall. Poplar had a lignin concentration of 63% in the middle lamella and 6% in the secondary wall of libriform fibres, while linseed had corresponding values of 69 % and 13 %. The secondary wall of poplar vessel elements had a lignin concentration of 25 %. In all three species most of the stem tissue was lignified except for phloem and bark, where present. In linseed the pith was unlignified. In wheat, most of the parenchyma cells were lignified except for a few cells lining the stem cavity. Libriform fibres in poplar and linseed sometimes had an unlignified gelatinous layer in samples containing tension wood. In linseed, lignification was greater in xylem fibres compared to bast fibres. Ray parenchyma cells of poplar and linseed appeared to be lignified to the same extent as xylem fibres.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "HF cavity"

1

Бондаренко, И. Н., В. А. Николаенко, and А. В. Полищук. "The cavity with the Tunnel Diodes and Corbino-Electrodes for Analyze Dielectrics and Semiconductors." Thesis, Sumy State University, 2019. http://openarchive.nure.ua/handle/document/10409.

Full text
Abstract:
. Study of nano structures is importance as bind the nanotechnology and applying. Many methods and tools use here (EPA); (NMR); AFM, X-ray so on. The high frequency (HF) resonance method at low temperature is sensitive and exact method because high quality of resonance and neglecting both the device noise and losses in matter. The “gaga – nano” conception take a place here too. The using little tunnel diodes as the generator and the detector in cavity is ideal for that aim. In this project cavity bottom is system of coaxial insulated rings (Corbino geometry) which applied as the low frequency (LF) analyzer as well as the modulator of HF field. So, we proposed HF - LF mini- analyzer for study of matter, the composition of device is given.
APA, Harvard, Vancouver, ISO, and other styles
2

Jenhani, H. "Coupleurs de puissance HF pour cavités supraconductrices en mode pulsé." Phd thesis, Université Paris Sud - Paris XI, 2006. http://tel.archives-ouvertes.fr/tel-00121954.

Full text
Abstract:
Des avancées technologiques très importantes ont permis d'augmenter d'une manière drastique les valeurs des champs accélérateurs dans les cavités supraconductrices. Ces dernières sont devenues très attractives et ont été choisies pour des projets d'accélérateurs de grande ampleur tels que le XFEL et le collisionneur du futur ILC. Le temps de conditionnement HF des coupleurs alimentant les cavités supraconductrices et la quête de fiabilité face aux nouvelles contraintes de fonctionnement sont devenus des priorités pour ces projets internationaux.
Etant des composants complexes, les coupleurs TTF-III pour les cavités supraconductrices du projet XFEL ont un comportement difficile à modéliser ou à prévoir. Ainsi, nos travaux étaient principalement expérimentaux. Dans un premier temps, une automatisation complète du stand de test des coupleurs a été effectuée avec succès. Nous avons réussi, suite à cela, à conditionner une série de coupleurs TTF-III. Ces conditionnements ont permis de réaliser une étude sur les comportements des coupleurs pendant leurs conditionnements HF. Des expériences ont donné une estimation de l'effet de l'étuvage in-situ sur le temps de conditionnement. Les tests de certains de ces coupleurs sur cavités ont permis des fonctionnements à des champs de l'ordre de 35 MV/m.
Les études menées sur les coupleurs avaient pour principal objectif de réduire le temps de conditionnement. Ceci représente l'un des enjeux les plus importants pour faire valoir le choix d'un coupleur. Ce but a été réalisé suite à des optimisations apportées sur la procédure de conditionnement. Le temps de conditionnement a été fortement réduit.
Un intérêt particulier a également été donné aux processus de génération des courants électroniques dans les coupleurs, notamment par le multipactor. Des études de simulation de ce processus ont ainsi été effectuées. Son élimination par polarisation du conducteur interne a aussi fait l'objet d'un essai expérimental qui a validé l'efficacité de cette action sur TTF-III.
APA, Harvard, Vancouver, ISO, and other styles
3

Jenhani, Hassen. "Coupleurs de puissance HF pour cavités supraconductrices en mode pulsé." Paris 11, 2006. https://tel.archives-ouvertes.fr/tel-00121954.

Full text
Abstract:
Etant des composants complexes, les coupleurs TTF-III pour les cavités supraconductrices du projet XFEL ont un comportement difficile à modéliser ou à prévoir. Ainsi, nos travaux étaient principalement expérimentaux. Dans un premier temps, une automatisation complète du stand de test des coupleurs a été effectuée avec succès. Nous avons réussi, suite à cela, à conditionner une série de coupleurs TTF-III. Ces conditionnements ont permis de réaliser une étude sur les comportements des coupleurs pendant leurs conditionnements HF. Des expériences ont donné une estimation de l’effet de l’étuvage in-situ sur le temps de conditionnement. Les tests de certains de ces coupleurs sur cavités ont permis des fonctionnements à des champs de l’ordre de 35 MV/m. Les études menées sur les coupleurs avaient pour principal objectif de réduire le temps de conditionnement. Ceci représente l’un des enjeux les plus importants pour faire valoir le choix d’un coupleur. Ce but a été réalisé suite à des optimisations apportées sur la procédure de conditionnement. Le temps de conditionnement a été fortement réduit. Un intérêt particulier a également été donné aux processus de génération des courants électroniques dans les coupleurs, notamment par le multipactor. Des études de simulation de ce processus ont ainsi été effectuées. Son élimination par polarisation du conducteur interne a aussi fait l’objet d’un essai expérimental qui a validé l’efficacité de cette action sur TTF-III
The so called TTF-III input power coupler, adopted for the XFEL superconducting RF cavities are complex components. In order to better understand the behavior of this component we have performed a series of experiments on a number of such couplers. Initially, we developed a fully automated RF high power test stand for coupler conditioning procedure. Following this, we performed a series of coupler conditioning tests. This has allowed the study of the coupler behavior during processing. A number of experiments were carried out to evaluate the in-situ baking effect on the conditioning time. Some of the conditioned couplers were sent to DESY in order to be tested on 9-cells TESLA cavities under cryogenic conditions. These tests have shown that the couplers in no way limit the cavity performance, even up to gradients of 35 MV/m. The main objective of our coupler studies was the reduction of their conditioning time, which represents one of the most important criteria in the choice of coupler for high energy linacs. Excellent progress in reducing the conditioning time has been demonstrated by making appropriate modifications to the conditioning procedure. Furthermore, special attention was paid to electron generation processes in the couplers, via multipacting. Simulations of this process were made on both the TTF-III coupler and on a new coupler prototype, TTF-V. Experiments aimed at suppressing multipacting were also successfully achieved by using a DC bias on the inner conductor of the co-axial coupler
APA, Harvard, Vancouver, ISO, and other styles
4

Бондаренко, И. Н., and В. А. Николаенко. "The HF-LF minilab for analysing dielectric and semiconductor matter with the tunnel diod and corbino-electrodes in resonator." Thesis, 2020. http://openarchive.nure.ua/handle/document/14065.

Full text
Abstract:
Study the quantum-size structures of matter is important in order to coupling nanotechnologies and use of the nanomaterials. The high frequency (HF) resonant method in research of semiconductors and dielectrics at low temperature is sensitive and exact in row others. This is due to high quality of resonance at low signal-to-noise ratio and at small energy loss in tested matter. The concept of "giga - nano" takes a place here. The use of compact tunnel diodes as the generator and detector coupled with resonator considered in this work is attractive for low-temperature studies of nanostructures. The feature of work is also that the bottom of resonator is coaxial system of rings - Corbino geometry. The Corbino system serves, on the one hand, as analyzer of matter properties of at low frequencies (LF), on other one, serves as a modulator of HF field in resonator. Filling the vacuumed cavity by various gases additionally can serve by the specific theme of researches. So, proposed HF-LF mini-analyzer of matter for the low- temperature investigation. The main composition of device on resonator basis is given.
APA, Harvard, Vancouver, ISO, and other styles
5

Lan藍詠智, Yung-Chih, and 藍詠智. "A study of optimizing the pump efficiency of a HF-etched 976-nm all-fiber Laser cavity." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/46t89n.

Full text
Abstract:
碩士
國立成功大學
微電子工程研究所
105
This thesis studies on the cladding-pump technique to pump the ytterbium-doped fiber with a 915-nm multimode laser diode as a pumping source to generate 976-nm laser which is under the all-fiber system. We found that the Yb-doped fiber is difficult to laser at 976-nm in the cladding-pump system. Therefore, our main purpose is that etching the Yb-doped fiber by HF to decrease the diameter so that increasing the intensity of pump source and reducing the laser threshold. After that, we improved the quality of etching and optimized the pump efficiency to increase the laser efficiency. We found that the transmission of the SMF-130V etching by HF 24.5% was above 75%. The transmission of the SMF-130V etching by HF 30% is less than 20%, Presumably the slope of taper etching by HF 30% is larger, so that most of the light refract out of the fiber. We make different lengths of taper and compare their transmissions. We confirm that the smoother the taper’s slope become, the higher the transmission is. Next, the material of gain fiber is the phosphate glass, so that the etching rate between the Yb-doped fiber and SMF-130V is different. According to this result, we change the position of the taper from DCF 20/125 to Yb-doped fiber. Because of the different etching rate, the original etching method would result in the difference in diameter at the connection point of two fibers. It leads to low transmission. Changing the position of the taper can solve this problem. In the condition without TEC to reduce the loss of mode-field mismatch, we successfully increased the laser efficiency from the original 5.1% to 8.2%, the threshold decreased from 2.9W to 1.9W, and the maximum measured power from 223.8W to 320.5W.
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "HF cavity"

1

Tkachenko, Sergey, Jurgen Nitsch, and Ralf Vick. "HF coupling to a transmission line inside a rectangular cavity." In 2010 URSI International Symposium on Electromagnetic Theory (EMTS 2010). IEEE, 2010. http://dx.doi.org/10.1109/ursi-emts.2010.5637177.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Wang, Yuanhu, Liping Duo, Yuqi Jin, Shukai Tang, Haijun Yu, Jian Wang, and Jing Cao. "Single line oscillation of continuous wave HF chemical laser with a grating cavity." In XX International Symposium on High Power Laser Systems and Applications, edited by Chun Tang, Shu Chen, and Xiaolin Tang. SPIE, 2015. http://dx.doi.org/10.1117/12.2065276.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Li, Liucheng, Liping Duo, Yuanhu Wang, Shukai Tang, Haijun Yu, Guofu Li, and Jian Wang. "Spectral analysis of cavity chemiluminescence of a combustion-driven HF laser fueled by NF3." In XX International Symposium on High Power Laser Systems and Applications, edited by Chun Tang, Shu Chen, and Xiaolin Tang. SPIE, 2015. http://dx.doi.org/10.1117/12.2065285.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Tang, Shukai, Liucheng Li, Liping Duo, Yuanhu Wang, Haijun Yu, Yuqi Jin, and Fengting Sang. "Optical cavity temperature measurement based on the first overtones spontaneous emission spectra for HF chemical laser." In XX International Symposium on High Power Laser Systems and Applications, edited by Chun Tang, Shu Chen, and Xiaolin Tang. SPIE, 2015. http://dx.doi.org/10.1117/12.2065282.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Huang, Xiao. "Microstructure and Oxidation Behaviour of NGB and WGB Joints With Boron/Silicon Free Nickel Base Braze Alloys." In ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/gt2020-14017.

Full text
Abstract:
Abstract In this study, the microstructure and solidus and liquidus of several Ni-Co-Hf-Zr-Ti-Al braze alloys were first examined with the objective to develop a B and Si free low melting braze alloy for narrow gap (NGB) and wide gap brazing (WGB) and turbine component repair applications. Among various alloys examined, DSC was used to measure the solidus and liquidus during heating and cooling cycles. Following the measurements of liquidus and solidus, the microstructure was evaluated using SEM. Equations for calculating solidus and liquidus based on alloy’s compositions were established and the functions of each elements on these two characteristic temperatures were discussed. One selected alloy with a liquidus of 1201 °C was further employed for NGB and WGB experiments. The results showed that it was able join CMSX-4 at 1240°C without interfacial voids; and with the use of externally applied pressure and extended homogenization treatment the interfacial intermetallic compounds were substantially removed. Furthermore, the same braze alloy was used to fill a large artificial cavity in a WGB scheme at a reduced temperature of 1200°C. The braze alloy was able to fully bond the filler powder alloy in addition to join the two alloys to a IN 738 substrate. Finally, oxidation test was conducted at 1050°C (isothermal in static air) for 100 hours after NGB of CMSX-4 and WGB of IN 738. The results showed that the oxide formed on the standalone braze alloy is very dense and there is no sign of spallation. It contained primarily NiO (+CoO) with no other elements measured. For the NGB joints, large amount of scale spallation was observed on base alloy CMSX-4 while the NGB joint remained spallation free. The oxide formed on the NGB was NiO with partitions of Co, Al, Ti, Cr, and W. The WGB joint region in IN 738 showed oxide scale spallation on the IN 738 substrate side, leaving behind steps and depression on the sample surface. In the WGB joint itself, there were three notable phases after oxidation test, however, no scale spallation could be found. For the majority part of the surface, a Ni-rich oxide covered the surface. There were areas of smaller oxide particles with higher Cr content. Overall, the new boron/silicon free braze alloy was found to be able to join several superalloys in both WGB and NGB schemes without occurrence of defects and the oxidation resistance was superior to both substrate alloys examined in this study.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'HF cavity' for particular source types:
Journal articles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography