检索结果-南通市图书馆

Roll-to-roll fabrication of large-scale polyorgansiloxane thin film with high flexibility and ultra-efficient atomic oxygen resistance

引用

Plasma Science and Technology 2022年第6期24卷 173-181页

作者：李毅李中华李得天何延春曹生珠王虎高恒蛟胡汉军贺颖王媛朱俊 Science and Technology on Vacuum Technology and Physical Laboratory Lanzhou Institute of PhysicsChina Academy of Space TechnologyLanzhou 730000People's Republic of China School/Hospital of Stomatology School/Hospital of Stomatology Lanzhou University(Dental Hospital).Key Laboratory of Dental Maxillofacial Reconstruction and Biological Intelligence Manufacturing Gansu ProvinceSchool of StomatologyLanzhou UniversityLanzhou 730000People's Republic of China State Key Laboratory of Advanced Display Technology Special Display and Imaging Technology Innovation Center of Anhui ProvinceAnhui Provincial Key Laboratory of Advanced Functional Materials and DevicesAcademy of Opto-Electric TechnologyHefei University of TechnologyHefei 230009People's Republic of China

One of the most widely used and well-established atomic oxygen(AO)protection solutions for low Earth orbit(LEO)satellites is the deposition of protective coatings on polymeric ***,manufacturing extensive expanses of these coating materials with good transparency,flexibility,smoothness,ultra-thinness,and exceptional AO resistance remains a critical ***,we successfully deposited a 400 nm thick polyorgansiloxane(SiO_(x)C_(y)H_(z))coating with high optical transparency and uniform good adherence on to a 1.2 m wide polyimide surface,by optimizing the distribution of hexamethyldisiloxane and oxygen as precursors in the roll-to-roll compatible plasmaenhanced chemical vapor deposition *** AO irradiation with the fluence of 7.9×10^(20)atoms·cm^(–2),the erosion yield of the SiO_(x)C_(y)H_(z)-coated Kapton was less than 2.30×10^(–26)cm^3·atom^(–1),which was less than 0.77%of that of the *** indicates that the SiO_(x)C_(y)H_(z)coating can well prevent the erosion of Kapton by *** addition,it was also clarified that a SiO_(2) passivation layer was formed on the surface of the SiO_(x)C_(y)H_(z)coating during AO irradiation,which exhibited a‘self-reinforcing’defense *** entire preparation process of the SiO_(x)C_(y)H_(z)coating was highly efficient and low-cost,and it has shown great potential for applications in LEO.

关键词： plasma-enhanced chemical vapor deposition hexamethyldisiloxane polyorganosiloxane thin film flexibility atomic oxygen

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effects of Vacuum Ultraviolet Radiation on atomic oxygen Erosion of Polysiloxane/SiO_2 Hybrid Coatings

引用

Journal of Materials Science & Technology 2009年第4期25卷 483-488页

作者： Longfei Hu Meishuan Li Yanchun Zhou Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Graduate Schoolof Chinese Academy of Sciences Beijing 100039 China

Polysiloxane/SiO2 hybrid coatings have been prepared on Kapton films by a sol-gel process. The erosion resistance of polysiloxane/Si02 （20 wt pct） coating was evaluated by exposure tests of vacuum ultraviolet radiation （VUV） and atomic oxygen beam （AO） in a ground-based simulation facility. The experimental results indicate that this coating exhibits better AO resistance than pure polysiloxane coating. The erosion yield （Ey） of the polysiloxane/Si02 （20 wt pct） hybrid coating is about 10-27 cm3/atom, being one or two orders of magnitude lower than that of polysiloxane. VUV radiation can affect the erosion process greatly. Under simultaneous AO and VUV exposure, the value of Ey of the polysiloxane/5iO2 （20 wt pct） hybrid coating increases by 3g% compared with that under single AO exposure.

关键词： atomic oxygen Vacuum ultraviolet radiation Erosion yield Hybrid coating

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

BARK-MIMETIC LAYER-BY-LAYER ASSEMBLED MONTMORILLONITE/POLY(p-AMINOSTYRENE) FLEXIBLE NANOCOMPOSITES SHIELDING atomic oxygen EROSION

引用

Chinese Journal of Polymer Science 2013年第1期31卷 83-87页

作者： Min Gao Bing-jun Liu 高龙成 Peng-gang Yin Lei Jiang Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education School of Chemistry and EnvironmentBeiHang University Beijing National Laboratory for Molecular Sciences (BNLMS) Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of Sciences

Inspired by the birch bark, which has multilayered structures, we fabricated layer-by-layer （LbL） assembled montmorillonite （MMT） and poly（p-aminostyrene）（PPAS） nanocomposites on cotton fiber curved surfaces to provide protection from atomic oxygen （AO） erosion. The multilayer coated fibers had high flexibility, uniformity, defect free, ease of preparation and low cost. The AO erosion durability has been dramatically enhanced which was evidenced by testing in the ground-based AO effects simulation facility. And the dimension and surface morphologies of the fibers observed by SEM had few changes, indicating excellent AO erosion resistant ability of the coatings. These results provide us a new method to design fibrous materials exposed directly in low earth orbit environment.

关键词： Layer-by-layer assembly atomic oxygen Biomimetics Adhesion Aerospace materials.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Preparation and anti atomic oxygen erosion properties of OPPOSS/PI composites

引用

International Journal of Minerals,Metallurgy and Materials 2013年第10期20卷 994-1000页

作者： Wei-ping Li Hui-cong Liu Li-li Feng School of Materials Science and Engineering Beihang University Key Laboratory of Urban Stormwater System and Water Environment (Ministry of Education) Beijing University of CivilEngineering and Architecture

atomic oxygen （AO） found in low earth orbit can cause serious erosion to polyimide （PI） materials, which greatly limits their lifetime. 8-phenyl silsesquioxane （OPPOSS） was synthesized, and OPPOSS/PI composites were pre- pared by physical blending, followed by thermal imidization to enhance the AO erosion resistance of PI materials. The morphology, composition, and structure of the composites were analyzed before and after AO exposure in a ground sim- ulated facility of atomic oxygen. After 16 h AO exposure, the OPPOSS/PI composite with 5wt% OPPOSS addition shows an erosion rate of about 1.4×10-24 cm3/atom with only 48% mass loss of that of PI without OPPOSS addition. The mixture of OPPOSS nano molecules is assembled into a kind of regular square structure and distributed evenly in OPPOSS/PI composites. Some SiO2 particles are formed in the composites during AO exposure, which can act as ＂inert points＂ to reduce the AO erosion rate of OPPOSS/PI composites.

关键词： composite materials polyimides silsesquioxanes atomic oxygen erosion

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Behavior of pure and modified carbon/carbon composites in atomic oxygen environment

引用

International Journal of Minerals,Metallurgy and Materials 2014年第2期21卷 190-195页

作者： Xiao-chong Liu Lai-fei Cheng Li-tong Zhang Xin-gang Luan Hui Mei Science and Technology on Thermostructural Composite Materials Laboratory School of Materials Science and Engineering Northwestern Polytechnical University

atomic oxygen （AO） is considered the most erosive particle to spacecraft materials in low earth orbit （LEO）. Carbon fiber, car-bon/carbon （C/C）, and some modified C/C composites were exposed to a simulated AO environment to investigate their behaviors in LEO. Scanning electron microscopy （SEM）, AO erosion rate calculation, and mechanical property testing were used to characterize the material properties. Results show that the carbon fiber and C/C specimens undergo significant degradation under the AO bombing. According to the effects of AO on C/C-SiC and CVD-SiC-coated C/C, a condensed CVD-SiC coat is a feasible approach to protect C/C composites from AO degradation.

关键词： atomic oxygen oxidation carbon/carbon composites ceramic matrix composites

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Damage behavior of atomic oxygen on CVD SiC coating-modified carbon/carbon composite in low earth orbit environment

引用

Journal of Materials Science & Technology 2019年第12期35卷 2957-2965页

作者： Guanghai Liu Laifei Cheng Xingang Luan Jiaxin Zhang Science and Technology on Thermostructural Composite Materials Laboratory Northwestern Polytechnical University

In this work, samples of carbon/carbon(C/C) and chemical vapor deposited(CVD) SiC-coated C/C samples were investigated to understand the AO damage mechanism in low Earth orbit(LEO) environment. The ground-based simulated atomic oxygen(AO) generator was employed. Results indicate that the CVD SiC coating exhibited improved radiation resistance properties against AO radiation as evidenced by a 16%better strength retention ratio, 60% less mass ablation, and increased strength stability. The magnitude of these influences affected the surface morphology, as observed by scanning electron microscopy(SEM)and surface resistance meter test results. The variations in the surface constituents were confirmed by X-ray diffraction(XRD) and X-ray photoelectron spectroscopy(XPS) results. The main products left on surface after AO exposure are SiO2 and SiCxOyfilm. Additionally, Si atoms are found to be the preferential reacting element in the SiC coating, and this process is accompanied by graphite precipitation, grain growth, and crack necking. Also, the damage mechanism of the AO-exposed SiC coating was revealed and is discussed.

关键词： Carbon/Carbon CVD SiC coating Low earth orbit atomic oxygen Exposure Stress

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Simulator for Producing of High Flux atomic oxygen Beam by Using ECR Plasma Source

引用

Journal of Materials Science & Technology 2004年第6期20卷 759-762页

作者： Shuwang DUO, Meishuan LI and Yaming ZHANGShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China Shenyang Natl. Lab. for Mat. Sci. Inst. of Metal Res. Chinese Acad. of Sci. Shenyang 110016 China

In order to study the atomic oxygen corrosion of spacecraft materials in low earth orbit environment, an atomic oxygen simulator was established. In the simulator, a 2.45 GHz microwave source with maximum power of 600 W was launched into the circular cavity to generate ECR (electron cyclotron resonance) plasma. The oxygen ion beam moved onto a negatively biased Mo plate under the condition of symmetry magnetic mirror field confine, then was neutralized and reflected to form oxygen atom beam. The properties of plasma density, electron temperature, plasma space potential and ion incident energy were characterized. The atomic oxygen beam flux was calibrated by measuring the mass loss rate of Kapton during the atomic oxygen exposure. The test results show that the atomic oxygen beam with flux of 1016-1017 atoms-cm-2·s-1 and energy of 5-30 eV and a cross section of φ80 mm could be obtained under the operating pressure of 10-1-10-3 Pa. Such a high flux source can provide accelerated simulation tests of materials and coatings for space applications.

关键词： atomic oxygen Low earth orbit space environment ECR plasma Microwave

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Investigation of Surface Reaction and Degradation Mechanism of Kapton during atomic oxygen Exposure

引用

Journal of Materials Science & Technology 2003年第6期19卷 535-539页

作者： ShuwangDUO MeishuanLI YanchunZHOU JingyuTONG GangSUN ShenyangNationalLaboratoryforMaterialsScience InstituteofMetalResearchChineseAcademyofSciencesShenyang110016China BeijingInstituteofSatelliteEnvironmentEngineering Beijing100029China

The erosion behavior of Kapton when exposed to the atomic oxygen (AO) environment in the ground-based simulation facility was studied. The chemical and physical changes of sample surfaces after exposed to AO fluxes were investigated by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and atomic force microscopy (AFM). The results indicated that Kapton underwent the dramatic degradation, including much mass loss and the change of surface morphologies; the vacuum outgassing effect of Kapton was the key factor for initial mass loss in the course of atomic oxygen beam exposures. The XPS analysis showed that the carbonyl group in Kapton reacted with oxygen atoms to generate CO2, then CO2 was desorbed from the Kapton surface. In addition, PMDA in the polyimide structure degraded due to the reaction with the atomic oxygen of 5 eV.

关键词： Kapton Corrosion XPS atomic oxygen

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Ground-based Investigations of atomic oxygen Erosion Behaviors of Silver and Ion-implanted Silver

引用

Chinese Journal of Aeronautics 2006年第B12期19卷 252-256页

作者： DUO Shu-wang LI Mei-shuan YIN Xiao-hui LI Wen-kui LI Ming-sheng Jiangxi Key Laboratory of Surface Engineering Jiangxi Science ＆ Technology Normal University Nanchang 330013 China Shenyang National Laboratory for Materials Science Institute of Metal Research CAS Shenyang 110016 China

Silver foils and ion-implanted silver foils exposed to atomic oxygen （AO） generated in a ground simulation facility were investigated by the quartz crystal microbalance （QCM）, the scanning electron microscopy （SEM） and the X-ray photoelectron spectroscopy （XPS）. The experimental results show the presence of Ag2O and AgO in an oxidation process of the silver foil having exposure to AO. As soon as silver comes under the bombardment of atomic oxygen, the oxidation process starts with a thick film forming on the silver surface. Because of the development of stresses, the oxide layer gets cracked and spalled, which leads to appearance of a new silver surface intensifying further oxidation. At last, AgO begins to form on the outer surface of the oxide film. The analytical results of the XPS and the AES attest to formation of a continuous high-quality protective oxide-based layer on the surface of ion-implanted silver films after exposure to AO. This layer can well protect materials in question from erosion.

关键词： atomic oxygen ion-implantation silver oxidation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

原子氧辐照对透明导电氧化物薄膜的影响(英文)

引用

Chinese Journal of Aeronautics 2007年第5期20卷 464-468页

作者：王文文王天民北京航空航天大学理学院材料物理与化学研究中心

Transparent conductive oxide （TCO） thin film is a kind of functional material which has potential applications in solar cells and atomic oxygen （AO） resisting systems in spacecrafts. Of TCO, ZnO：Al （ZAO） and In2O3：Sn （ITO） thin films have been widely used and investigated. In this study, ZAO and ITO thin films were irradiated by AO with different amounts of fluence. The as-deposited samples and irradiated ones were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM） and Hall-effect measurement to investigate the dependence of the structure, morphology and electrical properties of ZAO or ITO on the amount of fluence of AO irradiation. It is noticed that AO has erosion effects on the surface of ZAO without evident influences upon its structure and conductive properties. Moreover, as the amount of AO fluence rises, the carrier concentration of ITO decreases causing the resistivity to increase by at most 21.7%.

关键词： transparent conductive oxide thin film ZnO:Al In2O3:Sn atomic oxygen erosion electrical properties

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：