|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Innovative boron nitride-doped propellants显示文摘The U.S. military has a need for more powerful propellants with balanced/stoichiometric amounts of fuel and oxidants. However, balanced and more powerful propellants lead to accelerated gun barrel erosion and markedly shortened useful barrel life. Boron nitride(BN) is an interesting potential additive for propellants that could reduce gun wear effects in advanced propellants(US patent pending 2015-026P). Hexagonal boron nitride is a good lubricant that can provide wear resistance and lower flame temperatures for gun barrels. Further, boron can dope steel, which drastically improves its strength and wear resistance, and can block the formation of softer carbides. A scalable synthesis method for producing boron nitride nano-particles that can be readily dispersed into propellants has been developed. Even dispersion of the nano-particles in a double-base propellant has been demonstrated using a solvent-based processing approach. Stability of a composite propellant with the BN additive was verified. In this paper, results from propellant testing of boron nitride nano-composite propellants are presented, including closed bomb and wear and erosion testing. Detailed characterization of the erosion tester substrates before and after firing was obtained by electron microscopy,inductively coupled plasma and x-ray photoelectron spectroscopy. This promising boron nitride additive shows the ability to improve gun wear and erosion resistance without any destabilizing effects to the propellant. Potential applications could include less erosive propellants in propellant ammunition for large, medium and small diameter fire arms. | Thelma MANNING Richard FIELD Kenneth KLINGAMAN Michael FAIR John BOLOGNINI Robin CROWNOVER Carlton P.ADAM Viral PANCHAL Eugene ROZUMOV Henry GRAU Paul MATTER Michael BEACHY Christopher HOLT Samuel SOPOK | 2016 | Defence Technology(防务技术)2016，12，2： | 1 |
| 2 | HYPERLIPIDEMIA AFTER LIVER TRANSPLANTATION: Natural History and Treatment with the Hydroxy-Methylglutaryl-Coenzyme A Reductase Inhibitor Pravastatin1显示文摘 | David K. Imagawa Sherfield Dawson Curtis D. Holt Pamela S. Kirk Fady M. Kaldas Christopher R. Shackleton Philip Seu Steve M. Rudich Milan M. Kinkhabwala Paul Martin Leonard I. Goldstein Natalie G.B. Murray Paul I. Terasaki Ronald W. Busuttil | 1996 | Transplantation1996，，7： | 1 |
| 3 | Skin Extracellular Matrix Stimulation following Injection of a Hyaluronic Acid–Based Dermal Filler in a Rat Model显示文摘 | Sumit Paliwal Steven Fagien Xiaojian Sun Tyler Holt Thomas Kim Christopher K. Hee Dennis Van Epps Darin J. Messina | 2014 | Plastic and Reconstructive Surgery2014，，6： | 1 |
| 4 | Facilitating Water electrolysers for electricity-grid services in Europe through establishing standardized testing protocols显示文摘Electrolysers,which convert electricity into hydrogen,have the potential to offer a variety of electrical-grid services,therefore facilitating the integration of intermittent renewables into electrical grids.Among various activities that aim to unlock this hidden value,the 3-year European Union project QualyGridS launched in 2017 aims to establish standardized testing protocols for electrolysers to perform electricity-grid services.This paper shares experience and intermediate results of QualyGridS with respect to the testing protocols,test benches and testing results.The results of this work facilitate mutual understanding between the electricity industry and the hydrogen industry,support further development of the cross-sector testing standards,guide the design and selection of grid-service-oriented electrolyser applications and foster the transition towards a fossil-free-energy future based on high shares of hydrogen and other renewable solutions. | Shi You Regine Reissner Christoph Imboden Cyril Bourasseau Pablo Marcuello Daniel Greenhalgh Ben Green Laura Abadía Vanesa Gil Marius Bornstein Yi Zong Xu Chen Chresten Træholt | 2020 | Clean Energy2020，4，4： | 0 |
| 5 | Investigation into a practical approach and application of cotton fiber elongation显示文摘Background The strength of cotton fiber has been extensively studied and significantly improved through selec-tive breeding,but fiber elongation has largely been ignored,even though elongation contributes to determining the energy needed to break fibers.Recent developments to calibrate the high volume instrument(HVI)for elongation has renewed interest in elongation.However,it is not understood how best to utilize yet another fiber property which has the potential to add to the complexity of fiber selection.To explore a practical approach to applying elongation,cot-ton samples were tested using single fiber methods,the Stelometer,and the HVI.Comparison of strength,elongation,and combined properties such as modulus were explored.Results HVI testing was shown to be sensitive enough to characterize elongation differences but unlike single fiber testing it was unable to capture within-sample variation.Fiber bundle testing,like Stelometer and HVI was shown to reduce bias due to fiber selection.Conclusion The use of secant modulus,an intrinsic material property,allowed for one value to represent both strength and elongation.Secant modulus was shown to contain more useful information than either elongation or work-to-break.Work-to-break was shown to be more influenced by a specific value of breaking force or elongation rather than the intrinsic behavior of the sample being tested.Exploring the influence of genetics and environment on elongation,and its interaction with other fiber properties,requires additional work.Secant modulus,by combining strength and elongation into one value,shows the potential to incorporate elongation values into fiber characteriza-tion without increasing the complexity of current fiber selection processes. | DELHOM Christopher D. WANJURA John D. PELLETIER Mathew G. HOLT Gregory A. HEQUET Eric F. | 2023 | Journal of Cotton Research2023，6，1： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员