硼基材料在表面工程上的应用的潜力

全面阐述了硼基材料适于表面工程上应用的各种潜在性能与特点，并分析了其在表面共程上的各种应用前景。     

表面工程技术发展概况

表面工程技术包括材料或产品的表面制备、涂层系统设计、涂覆施工、质量评价等一整套技术,其应用范围涉及各类有机、无机、金属材料及其工业产品。为适应大规模工业生产的需要,各种优质、高效、节能节材、省资源和减少环境污染的表面工程新技术应运而生,同时,随着真空、离子、激光等新技术的应用和现代表面分析测试手段的进步,赋予各种表面功能特性的功能涂层技术向更深、更广的领域迅速发展。因而,表面工程技术的应用为众多工业国家所关注,国民经济建设中的传统工程系统如基础结构工程、工业冷凝系统、化工反应系统等在采用表面工程技术解决其装饰、防腐、耐磨、润滑等方面都有     

纳米粉体材料与表面工程

纳米技术的飞速发展促进了表面工程技术的发展,纳米粉体材料的应用使表面工程技术呈现出强大的生命力,纳米表面工程成为表面工程领域新的重要发展方向。     

“冷喷涂技术研讨与应用专题会”第一轮通知

<正>中国机械工程学会表面工程分会作为我国表面工程技术领域权威的学术组织,已经连续成功举办了十多届全国表面工程大会,大会规模达到千人以上。学会聚集了一大批国内从事现代涂层技术研究、教学、应用和装备制造方面的专家、学者和企业家。为深入研讨表面工程领域新技术、新方法,促进我国表面工程新技术的发展,推动我国表面工程领域新技术的研究和应用,中国机械工程学会表面工程分会经过充分酝酿,组织了以各专业领域为重点的系列专题会议。     

表面工程的应用和再制造工程

简要阐述了表面工程的特点,介绍了表面工程在腐蚀防护,设备维修,节能节材等方面的应用,阐述了先进制造技术与表面工程及再制造的关系,并展望了再制造工程的发展前景。     

先进表面工程技术发展前沿

先进表面工程技术是当代材料科技、真空科技与高科技的交叉领域和发展前沿,成为现代高新技术领域和先进制造业的重要前沿之一,在高性能防护涂层和功能薄膜方面应用广泛.本文综述了先进表面工程的发展趋势、工艺过程及其新进展与当代科技架构的关系以及先进表面工程技术的产业化.文章最后强调指出,在先进表面工程技术中采用远离平衡态镀膜技术、等离子体技术、激光技术、纳米技术等均取得了良好的应用效果.     

沈阳表面工程协会第一届第三次年会将于8月召开

沈阳表面工程协会第一届第三次年会将于８月召开［本刊讯］沈阳表面工程协会第一届第三次年会将于１９９５年８月在沈阳召开。会议征集论文的主题应围绕表面工程技术在工业上的应用。表面。程技术包括：涂装、电镀、热喷涂、刷镀、化学镀、转化膜、气相沉积和高能束表面改...     

表面工程在油料装备维修中的应用前景

分析了油料(POL)装备维修保障的现状和进展,讨论了表面工程技术在油料装备维修的应用前景,并分别论述了等离子焊接、纳米电刷镀和高速电弧喷涂3种表面工程技术在油料装备维修工作的技术可行性和应用前景。     

综合信息

中国机械工程学会表面工程分会换届会议在重庆召开中国机械工程学会表面工程分会于2005年11月7日在重庆召开了换届会议。第三届委员会由徐可为等69人组成,会议同期召开了表面工程技术研究进展及应用研讨会。作为当前世界材料科学领域和先进制造技术中的热点之一,表面工程技术的研究和应用为工程领域的资源节约和降低能耗发挥着日益重要的作用。特邀报告有:钛合金表面生物学改性的若干研究、舰船大功率柴油机缸套抗划伤技术的研究、智能涂层的进展与应用、医用钛合金的表面改性、表面工程抗微动损伤研究、纳米涂层技术进展、表面功能复合材料…     

表面工程与“超金属”修补剂

介绍了表面工程的发展历程，表面工程与维修工程的关系，着重介绍了表面粘涂技术以及表面粘涂新材料系列“超金属”修补剂在设备维修、防护与密封方面的应用。     

An investigational analysis of W-shaped engineering hybrid fiber composites utilizing steel and boron carbide

As engineering demands increase, ordinary conventional materials cannot satisfy requirements in the 21st Century. Hybrid ceramic/metal matrix engineering composites introduce original design concepts which surpass criteria and enhance design standards, particularly when utilized within civil and thermal engineering applications. The selection of boron carbide, B₄C, in civil engineering applications displays unique property values, including flexural rigidity and stresses, and when infused with select A992 structural steel allows secondary opportunities for complex and diverse engineering applications. This article investigates an overview of boron carbide fibers and its steel matrix (SB₄C) with conventional steel, focusing on flexural rigidity and stresses. The flexural rigidity of laminated boron carbide fibers with W-shaped structural steel members is also observed. A civil engineering application based on flexural rigidity of a basic and a laminated SB₄C member is discussed as well. The investigation reveals that the SB₄C combination displays greater strength and stiffness values than conventional steel construction.     

Versatile gradients of chemistry, bound ligands and nanoparticles on alumina nanopore arrays

Nanoporous alumina (PA) arrays produced by self-ordering growth, using electrochemical anodization, have been extensively explored for potential applications based upon the unique thermal, mechanical and structural properties, and high surface-to-volume ratio of these materials. However, the potential applications and functionality of these materials may be further extended by molecular-level engineering of the surface of the pore rims. In this paper we present a method for the generation of chemical gradients on the surface of PA arrays based upon plasma co-polymerization of two monomers. We further extend these chemical gradients, which are also gradients of surface charge, to those of bound ligands and number density gradients of nanoparticles. The latter represent a highly exotic new class of materials, comprising aligned PA, capped by gold nanoparticles around the rim of the pores. Gradients of chemistry, ligands and nanoparticles generated by our method retain the porous structure of the substrate, which is important in applications that take advantage of the inherent properties of these materials. This method can be readily extended to other porous materials.     

Challenges and solutions in surface engineering and assembly of boron nitride nanosheets

Atomically thin boron nitride nanosheets (BNNSs) are normally considered to be chemically inert, which makes them difficult to be functionalized. Many applications require new surface functionalities. Significant efforts have been made towards surface engineering and assembly of BNNSs. In this article, we contribute a critical review of the topic on challenges and solutions in surface engineering and assembly of BNNSs. We first outline the mechanistic insights of tunable surface functionalization of BNNSs, and then highlight some new breakthroughs, seminal studies, and trends in the area that have been most recently reported by our groups and others. Recent application researches include but are not limited to: (1) chemical catalysis; (2) biocompatible BN functional nanomaterials for biological and biomedical applications; (3) molecularly engineered BN surfaces for sensing and drug delivery applications; and (4) the construction of thermally conductive and electrically insulating composites. There is also an in-depth discussion on the merits of the processing-structure–property relationships in the functionalized BNNSs. Finally, with this review article, we hope to spark new ideas and inspire new functionalization strategies by fundamentally understanding surface properties and engineering BNNSs with programmable structures and predictable properties.     

Structure and wear resistance of the composite layers produced by glow discharge nitriding and PLD method on AISI 316L austenitic stainless steel

The rapid technical development enhances the demands on constructional materials in terms of their resistance to frictional wear, resistance to corrosion and erosion, high hardness, high tensile and fatigue strength. These demands can be satisfied by e.g. applying various surface engineering techniques that permit to modify the microstructure, phase and chemical composition of the surface layers of the treated parts. A prospective line of the development of surface engineering is the production of composite layers by combining various surface engineering methods. The paper presents the results of examinations of the phase composition and frictional wear resistance of the layers produced by hybrid processes, i.e. such that combined glow discharge assisted nitriding performed at 450 °C and 550 °C with a pulsed laser deposition of boron nitride coatings (PLD method). It has been shown that the boron nitride coatings formed on nitrided AISI 316L steel increase its frictional wear resistance.     

Structure and wear resistance of the composite layers produced by glow discharge nitriding and PLD method on AISI 316L austenitic stainless steel

The rapid technical development enhances the demands on constructional materials in terms of their resistance to frictional wear, resistance to corrosion and erosion, high hardness, high tensile and fatigue strength. These demands can be satisfied by e.g. applying various surface engineering techniques that permit to modify the microstructure, phase and chemical composition of the surface layers of the treated parts. A prospective line of the development of surface engineering is the production of composite layers by combining various surface engineering methods. The paper presents the results of examinations of the phase composition and frictional wear resistance of the layers produced by hybrid processes, i.e. such that combined glow discharge assisted nitriding performed at 450 °C and 550 °C with a pulsed laser deposition of boron nitride coatings (PLD method). It has been shown that the boron nitride coatings formed on nitrided AISI 316L steel increase its frictional wear resistance.     

Surface modification of hexagonal boron nitride nanomaterials: a review

Hexagonal boron nitride (h-BN) nanomaterials, such as boron nitride nanotubes, boron nitride nanofibers, and boron nitride nanosheets, are among the most promising inorganic nanomaterials in recent years. Their unique properties, including high mechanical stiffness, wide band gap, excellent thermal conductivity, and thermal stability, suggest many potential applications in various engineering fields. In particular, h-BN nanomaterials have been widely used as functional fillers to fabricate high-performance polymer nanocomposites. Like other nanomaterials, prior to their utilization in nanocomposites, surface modification of h-BNs is often necessary in order to prevent their strong tendency to aggregate, and to improve their dispersion and interfacial properties in polymer nanocomposites. However, the high chemical inertness and resistance to oxidation of h-BNs make it rather difficult to functionalize h-BNs. The methods frequently used to oxidize graphitic carbon nanomaterials are not quite successful on h-BNs. Therefore, many novel approaches have been studied to modify h-BN nanostructures. In this review, different surface modification strategies were discussed including various covalent and non-covalent surface modification strategies through wet or dry chemical routes. Meanwhile, the effects of these surface modification methods on the resulting material structures and properties were also reviewed. At last, a number of theoretical studies on the reactivity of h-BNs with different chemical agents have been conducted to explore new surface modification routes, which were also addressed in this review.     

Phonon Polaritons in Monolayers of Hexagonal Boron Nitride

Phonon polaritons in van der Waals materials reveal significant confinement accompanied with long propagation length: important virtues for tasks pertaining to the control of light and energy flow at the nanoscale. While previous studies of phonon polaritons have relied on relatively thick samples, here reported is the first observation of surface phonon polaritons in single atomic layers and bilayers of hexagonal boron nitride (hBN). Using antenna‐based near‐field microscopy, propagating surface phonon polaritons in mono‐ and bilayer hBN microcrystals are imaged. Phonon polaritons in monolayer hBN are confined in a volume about one million times smaller than the free‐space photons. Both the polariton dispersion and their wavelength–thickness scaling law are altered compared to those of hBN bulk counterparts. These changes are attributed to phonon hardening in monolayer‐thick crystals. The data reported here have bearing on applications of polaritons in metasurfaces and ultrathin optical elements.     

发泡法制备二维材料泡沫体的进展

以石墨烯为代表的二维材料具有优异的本征性质, 例如高表面积和电导率, 但其宏观块体材料的性质仍不理想。这是由于石墨烯片层堆叠损失了有效的表面; 片层之间联结较弱导致接触电阻和热阻增大。原则上二维材料的三维化设计能避免上述问题, 将纳米尺度的优异性质传递到宏观尺度, 获得高表面积、高导电、贯通孔道和优良机械性能的块体材料。二维材料多孔块体可用于电极、吸附剂和弹性体等。发泡法工艺简单、成本低, 是近年来制备二维材料泡沫体的主要方法。本文系统总结了发泡法的基本原理, 综述了石墨烯、氮化硼等二维材料泡沫体的研究进展, 展望了二维材料泡沫体在能源、环境等方面的应用前景。     

Machinablity of Hybrid Natural Fiber Composite with and without Filler as Reinforcement

The filler materials are reinforced along with natural fibers in the composite to improve the quality and property of the component materials based on the requirements and its applications. In this paper, hybrid natural fiber composites were developed with and without filler materials as reinforcement. The developed hybrid natural fiber composites are machined using abrasive water jet cutting process with three different cutting parameters. The influences of cutting parameters are evaluated with respect to the kerf wall inclination, material removal rate, and surface roughness. The surface morphology was also studied to infer the basic mechanism involved during composite machining. The hybrid fiber composite with filler has proved that it can produce good engineering component without delamination and fiber pullouts during machining.