Forming nanostructures
    3.
    发明授权
    Forming nanostructures 有权
    形成纳米结构

    公开(公告)号:US07794784B2

    公开(公告)日:2010-09-14

    申请号:US10517257

    申请日:2004-11-04

    IPC分类号: B05D7/00

    摘要: A method of forming a nanowire comprising: providing nanoparticles of a metallic material; providing a vapor of fluorocarbon molecules by heating a solid polymer; depositing at least some of the carbon of said molecules onto an exterior of one of said particles to form a deposit of carbon which surrounds at least part of the exterior of said one particle and assembling further of said particles with said one particle to form an elongate configuration of material in the form of a nanowire. Similar methods of production of nanotubes are also disclosed.

    摘要翻译: 一种形成纳米线的方法,包括:提供金属材料的纳米颗粒; 通过加热固体聚合物提供氟碳分子的蒸气; 将所述分子的至少一些碳沉积到所述颗粒之一的外部上以形成碳沉积物,所述沉积物围绕所述一个颗粒的外部的至少一部分并且与所述一个颗粒进一步组装所述颗粒以形成细长的 配置纳米线形式的材料。 还公开了类似的纳米管生产方法。

    BORON CARBIDE CERAMIC FIBERS
    4.
    发明申请
    BORON CARBIDE CERAMIC FIBERS 失效
    BORON碳化硅陶瓷纤维

    公开(公告)号:US20090318280A1

    公开(公告)日:2009-12-24

    申请号:US12486832

    申请日:2009-06-18

    IPC分类号: C04B35/563 D01F9/12

    摘要: A metal carbide ceramic fiber having improved mechanical properties and characteristics and improved processes and chemical routes for manufacturing metal carbide ceramic fiber. Metal carbide ceramic fibers may be formed via reaction bonding of a metal-based material (e.g. boron) with the inherent carbon of a carrier medium. One embodiment includes a method of making a metal carbide ceramic fiber using VSSP to produce high yield boron carbide fiber. Embodiments of the improved method allow high volume production of high density boron carbide fiber. The chemical routes may include a direct production of boron carbide fiber from boron carbide powder (B4C) and precursor (e.g. rayon fiber) having a carbon component to form a B4C/rayon fiber that may be processed at high temperature to form boron carbide fiber, and that may be subsequently undergo a hot isostatic pressing to improve fiber purity. Another route may include a carbothermal method comprising combining boron powder (B) with a precursor (e.g., rayon fiber) having a carbon component to form a B/rayon fiber, carbonizing and a chemical reaction of boron (B) and carbon (C) to form boron carbide fiber. Another carbothermal method may comprise combining boron oxide powder (B2O3) with a precursor (e.g., rayon fiber) having a carbon component to form a B2O3/rayon fiber, carbonizing and a chemical reaction of boron oxide (B2O3) and carbon (C) to form boron carbide (B4C) fiber.

    摘要翻译: 一种金属碳化物陶瓷纤维,其具有改进的机械性能和特性,以及用于制造金属碳化物陶瓷纤维的改进方法和化学 金属碳化物陶瓷纤维可以通过金属基材料(例如硼)与载体介质的固有碳的反应结合而形成。 一个实施方案包括使用VSSP制备金属碳化物陶瓷纤维以产生高产率碳化硼纤维的方法。 改进方法的实施例允许高容量生产高密度碳化硼纤维。 化学路线可以包括从碳化硼粉末(B4C)直接生产碳化硼纤维和具有碳组分的前体(例如人造纤维),以形成可在高温下加工以形成碳化硼纤维的B4C /人造丝纤维, 然后可以进行热等静压,以提高纤维纯度。 另一种途径可以包括碳热法,其包括将硼粉末(B)与具有碳组分的前体(例如人造丝纤维)组合以形成B /人造丝纤维,碳化和硼(B)和碳(C)的化学反应, 以形成碳化硼纤维。 另一种碳热法可以包括将氧化硼粉末(B 2 O 3)与具有碳成分的前体(例如人造纤维)组合以形成B 2 O 3 /人造丝纤维,碳化和氧化硼(B 2 O 3)和碳(C)的化学反应与 形成碳化硼(B4C)纤维。

    Metal carbides and process for producing same
    5.
    发明申请
    Metal carbides and process for producing same 审中-公开
    金属碳化物及其制造方法

    公开(公告)号:US20060051281A1

    公开(公告)日:2006-03-09

    申请号:US10937043

    申请日:2004-09-09

    IPC分类号: C01B31/30

    摘要: A metal carbide composition and a process for synthesizing metal carbides, through a single step process, wherein oxides of different metals, including, but not limited to Si, Ti, W, Hf, Zr, V, Cr, Ta, B, Nb, Al, Mn, Ni, Fe, Co, and Mo were physically mixed with spherical or filamentateous nano structured carbon, and inductively heated to a certain temperature range (900-1900° C.) where the metal oxide reacts with carbon to form different metal carbides. The process retains the original morphology of the starting carbon precursor in the resultant metal carbides. This method also produces highly crystalline metal nano-carbides. The metal carbide products would have applications in high temperature thermoelectric devices, quantum wells, optoelectronic devices, semi-conductors, body armour, vehicle armour, catalysts, and as discontinuous reinforced agents in metal such as aluminum and other alloys.

    摘要翻译: 金属碳化物组合物和通过单步法合成金属碳化物的方法,其中不同金属的氧化物,包括但不限于Si,Ti,W,Hf,Zr,V,Cr,Ta,B,Nb, 将Al,Mn,Ni,Fe,Co和Mo与球形或丝状纳米结构碳物理混合,并感应加热到一定温度范围(900-1900℃),其中金属氧化物与碳反应形成不同的金属 碳化物 该方法保留所得金属碳化物中原始碳前体的原始形态。 该方法也产生高度结晶的金属纳米碳化物。 金属碳化物产品将应用于高温热电器件,量子阱,光电器件,半导体,铠装,车辆护甲,催化剂以及金属如铝和其他合金中的不连续增强剂。

    Carbide nanofibrils and method of making same
    6.
    发明申请
    Carbide nanofibrils and method of making same 审中-公开
    硬质合金纳米纤丝及其制造方法

    公开(公告)号:US20050036933A1

    公开(公告)日:2005-02-17

    申请号:US10725225

    申请日:2003-12-01

    摘要: A plurality of carbide, such as silicon carbide, tungsten carbide, etc., nanofibrils predominantly having diameters substantially less than about 100 nm and a method for making such carbide nanofibrils. The method includes the steps of: heating a plurality of carbon nanotubes or nanofibrils predominantly having diameters less than about 50 nm in a reaction chamber in the presence of a gas of the form QnAm, where Q is a metal capable of forming a carbide, A is an element or radical and n and m are integers necessary to satisfy valences, such as, for example silicon monoxide, and an inert gas in a reaction vessel to a temperature substantially less than 1700 C but sufficently high to cause substantial reaction of the metal in the gas with the carbon of said carbon nanotubes or nanofibrils to form, in situ, solid carbide nanofibrils, the temperature being sufficiently low to prevent substantial fusing together of individidual ones of said carbide nanofibrils, removing at least a portion of A-based gas from said reaction chamber as said reaction progresses, and maintaining said temperature until substantially all the carbon of said nanotubes or nanofibrils has been converted into Q-based carbide.

    摘要翻译: 多个碳化物,例如碳化硅,碳化钨等,主要具有基本上小于约100nm的直径的纳米原纤维和制造这种碳化物纳米原纤维的方法。 该方法包括以下步骤:在QnAm形式的气体存在下,在反应室中加热主要具有小于约50nm的直径的多个碳纳米管或纳米原纤维,其中Q是能够形成碳化物的金属,A 是元素或基团,并且n和m是满足价态所必需的整数,例如一氧化硅和反应容器中的惰性气体至基本上低于1700℃的温度,但足够高以引起金属的显着反应 在具有碳纳米管或纳米原纤维的碳的气体中,原位形成整体碳纳米纤维,其温度足够低,以防止所述碳化物纳米原纤维的单独的大量熔融在一起,除去至少一部分基于A的气体 当所述反应进行时,从所述反应室中回收,并保持所述温度,直到所述纳米管或纳米原纤维的基本上全部的碳转化为基于Q 碳化物。

    Boron carbide fiber production
    10.
    发明授权
    Boron carbide fiber production 失效
    硼碳纤维生产

    公开(公告)号:US3725533A

    公开(公告)日:1973-04-03

    申请号:US3725533D

    申请日:1969-11-14

    申请人: CARBORUNDUM CO

    发明人: ECONOMY J MATKOVICH V

    摘要: Boric oxide fibers having a maximum diameter of about 10 microns are heated in an ammonia atmosphere to about 350*-600*C at a rate of temperature rise of up to about 5,000*C/hr. to produce ammonia-treated fibers consisting essentially of B, N. O and H. The ammonia-treated fibers are heated in an amine atmosphere at about 600*-1,000*C to produce amine-treated fibers consisting essentially of B, C, N, O and H and containing at least about 15% C. The amine-treated fibers may be heated at about 2,000*-2,350*C in an inert atmosphere to produce boron carbide fibers.

    摘要翻译: 最大直径为约10微米的氧化硼纤维在氨气氛中以升高至约5000℃/小时的速率加热至约350-600℃。 以生产基本上由B,N.O和H组成的氨处理的纤维。氨处理的纤维在胺气氛中在约600℃-1000℃下加热以产生基本上由B,C,N组成的胺处理的纤维 ,O和H并且含有至少约15%C。胺处理的纤维可以在约2000℃-2350℃下在惰性气氛中加热以产生碳化硼纤维。