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21 条记录 (耗时 0.019 秒)

    Method for manufacture of neutron absorbing article
    5.
    发明授权
    Method for manufacture of neutron absorbing article 失效
    中子吸收制品的制造方法

    公开(公告)号：US4313973A

    公开(公告)日：1982-02-02

    申请号：US133157

    申请日：1980-03-24

    申请人： Carl H. McMurtry ,  Robert G. Naum ,  Paul F. Forsyth

    发明人： Carl H. McMurtry ,  Robert G. Naum ,  Paul F. Forsyth

    IPC分类号： B29C70/02 ,  B29C70/88 ,  D06M11/74 ,  D06M15/41 ,  G21F1/12 ,  B05D1/28 ,  B05D5/00 ,  B05D5/02

    CPC分类号： B29C70/025 ,  B29C70/88 ,  D06M11/74 ,  D06M15/41 ,  G21F1/12

    摘要： A composite, neutron absorbing, coated article, normally flat and thin and of comparatively light weight, suitable for installation in storage racks for spent nuclear fuel and for other neutron absorbing applications, includes a backing member, preferably of flexible material such as woven fiberglass cloth, a synthetic organic polymeric coating or a plurality of such coatings on the backing member, preferably of cured phenolic resin, such as phenol formaldehyde or trimethylolphenol formaldehyde and boron carbide particles held to the backing member by the cured coating or a plurality of such coatings. Also described is a method for the manufacture of the neutron absorbing coated article and the use of such an article. In a preferred method the backing member is first coated on both sides thereof with a filling coating of thermosettable liquid phenolic resin, which is then partially cured to solid state, one side of the backing member is then coated with a mixture of thermosettable liquid resin and finely divided boron carbide particles and the resin is partially cured to solid state, the other side is coated with a similar mixture, larger boron carbide particles are applied to it and the resin is partially cured to solid state, such side of the article is coated with thermosettable liquid phenolic resin, the resin is partially cured to solid state and such resin, including previously applied partially cured resins, is cured to final cross-linked and permanently set form.

    摘要翻译： 通常平坦而薄且重量较轻的复合中子吸收涂层制品适用于安装在废核燃料和其他中子吸收应用的储存架中，包括背衬构件，优选为柔性材料，例如编织玻璃纤维布 ，背衬构件上的合成有机聚合物涂层或多个这样的涂层，优选固化的酚醛树脂，例如苯酚甲醛或三羟甲基酚甲醛，以及通过固化的涂层或多个这样的涂层保持在背衬构件上的碳化硼颗粒。 还描述了制造中子吸收涂层制品的方法和这种制品的用途。 在优选的方法中，首先在其两侧涂覆有背衬构件的可热固的液体酚醛树脂的填充涂层，然后将其部分固化成固体状态，然后用热固性液体树脂和 精细分散的碳化硼颗粒和树脂部分固化成固体状态，另一侧涂覆有类似的混合物，较大的碳化硼颗粒被施加到树脂上并将树脂部分固化成固态，制品的这一面被涂覆 使用可热固的液体酚醛树脂，将树脂部分固化成固态，并将这种树脂（包括预先涂敷的部分固化的树脂）固化成最终交联和永久固定的形式。

    Method for manufacturing neutron absorbing article
    6.
    发明授权
    Method for manufacturing neutron absorbing article 失效

    公开(公告)号：US4287145A

    公开(公告)日：1981-09-01

    申请号：US133182

    申请日：1980-03-24

    申请人： Carl H. McMurtry ,  Robert G. Naum ,  Dean P. Owens ,  Michael T. Hortman

    发明人： Carl H. McMurtry ,  Robert G. Naum ,  Dean P. Owens ,  Michael T. Hortman

    IPC分类号： G21C19/40 ,  G21F1/10 ,  B29J5/00

    CPC分类号： G21F1/103 ,  G21C19/40

    摘要： A neutron absorbing article, preferably in long, thin, flat form, suitable for but not necessarily limited to use in storage racks for spent nuclear fuel at locations between volumes of such stored fuel to absorb neutrons from said spent fuel and prevent uncontrolled nuclear reaction of the spent fuel material, is composed of finely divided boron carbide particles and a solid, irreversibly cured phenolic polymer forming a continuous matrix about the boron carbide particles, in such proportions that at least 6% of B.sup.10 from the boron carbide content is present therein. The described structures possess a multiplicity of desirable properties for the use mentioned, including withstanding thermal cycling from repeated spent fuel insertions and removals, withstanding radiation from said spent nuclear fuel over long periods of time without losing desirable neutron absorbing and physical properties, being sufficiently chemically inert to water so as to retain neutron absorbing properties if brought into contact with it, not being galvanically corroding and being sufficiently flexible so as to withstand operational basis earthquake and safe shutdown earthquake seismic events without loss of neutron absorbing capability and other desirable properties when installed in storage racks for spent nuclear fuel. In preferred embodiments of the invention the phenolic polymer is a phenol formaldehyde type polymer, such as a trimethylol phenol formaldehyde type polymer, the boron carbide contains at least 12% of B.sup.10, the plate contains from 8.0 to 11.5% thereof, the plate density is 1.6 to 2.1 g./cc. and the proportions of boron carbide (which may be accompanied by limited amounts of certain impurities) and phenol formaldehyde type polymer (preferably free of halogens, mercury, lead and sulfur) are from 20 to 35% of the former and 65 to 80% of the latter. The invention also relates to a plurality of such neutron absorbing articles in a storage rack for spent nuclear fuel and to a method for the manufacture of the articles. In the manufacturing method a portion of the phenol formaldehyde type resin, in liquid state, is mixed with the boron carbide particles, compacted and cured, after which the cured article is impregnated with additional phenol formaldehyde type resin, which is then cured to make the final product.

    Process for producing sintered silicon carbide ceramic body
    7.
    发明授权
    Process for producing sintered silicon carbide ceramic body 失效
    烧结碳化硅陶瓷体的制造方法

    公开(公告)号：US4124667A

    公开(公告)日：1978-11-07

    申请号：US790354

    申请日：1977-04-25

    申请人： John A. Coppola ,  Laurence N. Hailey ,  Carl H. McMurtry

    发明人： John A. Coppola ,  Laurence N. Hailey ,  Carl H. McMurtry

    IPC分类号： C04B35/565 ,  C04B35/52

    CPC分类号： C04B35/565

    摘要： Pressureless sintering of silicon carbide to produce ceramic bodies having 75% and greater theoretical densities, can be accomplished by firing shaped bodies, containing finely divided silicon carbide, boron source such as boron carbide, carbon source such as phenolic resin and a temporary binder, at a sintering temperature of from about 1900.degree. C to about 2500.degree. C.

    摘要翻译： 碳化硅的无压烧结以产生具有75％或更高理论密度的陶瓷体，可以通过将包含细碎碳化硅，硼源如碳化硼，碳源如酚醛树脂和临时粘合剂的成形体烧制在 烧结温度为约1900℃至约2500℃

    Vibratory grinding of silicon carbide
    10.
    发明授权
    Vibratory grinding of silicon carbide 失效
    碳化硅振动研磨

    公开(公告)号：US4695294A

    公开(公告)日：1987-09-22

    申请号：US722272

    申请日：1985-04-11

    申请人： Tadeusz M. Korzekwa ,  Carl H. McMurtry ,  Wolfgang D. G. Boecker

    发明人： Tadeusz M. Korzekwa ,  Carl H. McMurtry ,  Wolfgang D. G. Boecker

    IPC分类号： B02C17/14 ,  B02C17/20 ,  B24D3/02

    CPC分类号： B02C17/20

    摘要： A method for reducing the particle size of an initial silicon carbide powder to a milled powder having an average particle size of below 1 micron but greater than an average of about 0.2 micron, without grinding media contamination. The method comprises milling the larger particles in a vibratory mill in the presence of sintered silicon carbide media comprising silicon carbide pellets having both curved and flat surfaces and a maximum dimension of from about 0.5 to 5 centimeters. The grinding occurs in the presence of a fluid, preferably a liquid, for a sufficient time and at a sufficient vibrational energy to obtain said milled powder having such smaller average particle size. At least 90% of the pellets in the silicon carbide media have a specific gravity (density) greater than 3.05 g/cm.sup.3.The invention includes the unique media, which may be used for various grinding operations, and includes unique milled powders. One of the unique powders has particles which have an average length to width ratio of greater than 2.5. Another of the unique powders is black silicon carbide containing from 200 to 2,000 parts per million of aluminum in solid solution.

    摘要翻译： 一种将初始碳化硅粉末的粒度降低到平均粒度小于1微米但大于约0.2微米的研磨粉末的方法，而不研磨介质污染。 该方法包括在烧结碳化硅介质的存在下在振动研磨机中研磨更大的颗粒，所述烧结碳化硅介质包括具有弯曲和平坦表面的碳化硅球粒和最大尺寸为约0.5至5厘米。 研磨在流体存在下，优选液体发生足够的时间和足够的振动能，以获得具有如此较小的平均粒径的粉碎粉末。 碳化硅介质中的至少90％的颗粒的比重（密度）大于3.05g / cm 3。 本发明包括可用于各种研磨操作的独特介质，并且包括独特的研磨粉末。 其中一种独特的粉末具有平均长宽比大于2.5的颗粒。 另一种独特的粉末是在固体溶液中含有200至2,000份/百万份铝的黑色碳化硅。