摘要:
Fiber-reinforced ceramic matrix composite products comprising boron-nitride-coated reinforcing silicon carbide fibers disposed in a substantially non-porous alkaline earth aluminosilicate glass-ceramic matrix are disclosed, the matrix comprising triclinic anorthite (CaO,SrO.Al.sub.2 O.sub.3.2SiO.sub.2) as the principal crystal phase and the products exhibiting unexpectedly good resistance to high-temperature degradation.
摘要翻译:公开了包含设置在基本上无孔的碱土金属硅铝酸盐玻璃 - 陶瓷基体中的氮化硼涂覆的增强碳化硅纤维的纤维增强陶瓷基复合材料,所述基质包含三斜钙矾石(CaO,SrO.Al 2 O 3·2SiO 2)作为 主要结晶相,并且产品具有出乎意料的良好的耐高温劣化性能。
摘要:
Fiber-reinforced ceramic matrix composite products are made by providing inorganic fiber reinforcement materials with pyrolytic carbon coatings, combining the carbon-coated fibers with a selected ceramic matrix material to make a composite preform, and consolidating the preform with heat and pressure to form the fiber-reinforced composite. Preferably, the peak consolidation temperature of the composite is moderated, with the retained pyrolytic carbon coating acting to preserve tough fracture behavior in the composite product notwithstanding the absence of the conventional graphitic fiber interface layer therefrom.
摘要:
This invention is directed to spontaneous opal glasses wherein Ba.sub.2 F(PO.sub.4) constitutes the predominant crystalline opal phase. The glasses exhibit softening points in excess of 710.degree. C., excellent chemical durability, and consist essentially, in weight percent on the oxide basis, of 6-10% Na.sub.2 O, 1-6% K.sub.2 O, 4-11% BaO, 9-18% Al.sub.2 O.sub.3, 50-70% SiO.sub.2, 3.5-7% P.sub.2 O.sub.5, and 1-4% F.
摘要:
A tubular, rigid, porous, ceramic separator for a rechargeable, deep-discharge battery assembly, the separator having a porosity greater than 40%. A plurality of battery cells, each embodying such separators, are assembled with a common terminal to form the positive electrode in a motive traction battery.
摘要:
Inorganic reinforcing fibers comprising hybrid BN--C protective coatings containing up to 12% by weight of hexagonal (graphitic) carbon dissolved in the BN matrix but being essentially free of undissolved pyrolytic and graphitic carbon secondary phases, and fiber-reinforced ceramic matrix composite products incorporating the protectively-coated fibers, are disclosed. The fibers resist oxidation and provide good bonding interface characteristics when disposed in ceramic encapsulating materials, such that the composite products exhibit excellent resistance to high temperature embrittlement.
摘要:
Ceramic matrix composite articles comprising a matrix phase composed of a silicate glass or glass-ceramic and a matrix reinforcement material disposed within the matrix comprising carbon (e.g., graphite) fibers are described, wherein the fibers are provided with a protective boron nitride surface coating. The mechanical properties of the composites at high temperatures are substantially improved.
摘要:
This invention relates to the production of large shapes of metallic glasses from finely-dimensioned ribbons powders, flakes, wires, fibers, or filaments thereof. The inventive method contemplates placing the precursor finely-dimensioned articles of metallic glass into contact with one another and then hot pressing the mass at temperatures in the close vicinity of the glass transition temperature with applied forces of at least 1000 psi. One metallic glass, Fe.sub.58 Cr.sub.14 Cu.sub.6 Si.sub.6 B.sub.6, which is readily shaped into bulk bodies via the inventive method, exhibits excellent resistance to attack by sea water.
摘要:
A battery assembly comprising a separator, spaced metal/metal oxide electrodes and a liquid electrolyte, the improvement comprising a rigid, porous, ceramic separator that is wettable by the liquid electrolyte, that has a porosity of 40-90 volume %, an average pore size in the range of 0.1-25 microns, a thickness of 1-12 mm, and a weight loss of not more than about 5% when exposed to H.sub.2 SO.sub.4 having a specific gravity of 1.28 for 72 hours at 70.degree.C.
摘要翻译:一种电池组件,包括隔离物,间隔开的金属/金属氧化物电极和液体电解质,该改进包括刚性多孔的陶瓷隔板,其可被液体电解质润湿,孔隙率为40-90体积%,平均孔 尺寸在0.1-25微米的范围内,厚度为1-12毫米,当在70℃暴露于比重为1.28的H 2 SO 4 72小时时,重量损失不超过约5%。
摘要:
Inorganic reinforcing fibers provided with a multi-layer protective coating comprising a boron nitride sublayer and an oxide-based overcoating of alumina or synthetic mica, and fiber-reinforced ceramic matrix composite products incorporating the protectively-coated fibers, are disclosed. The fibers offer improved oxidation resistance and good compatibility with oxide-based glass and glass-ceramic composite matrix materials.
摘要:
This invention is related to the production of machinable glass-ceramic articles which are essentially free from crystals having a mica structure and consist essentially, in weight percent, ofSiO.sub.2 : 24-28Al.sub.2 O.sub.3 : 9-20MgO: 12-28SrO: 0-11BaO: 0-14CuO: 0-5Ag.sub.2 O: 0-3.5NiO: 0-1.5Cr.sub.2 O.sub.3 : 0.5-6.5F: 2-9
摘要翻译:本发明涉及生产可机加工的玻璃陶瓷制品,其基本上不含具有云母结构的晶体,其重量百分比基本上由SiO 2:24-28 Al 2 O 3:9-20 MgO:12-28 SrO:0 -11 BaO:0-14 CuO:0-5 Ag2O:0-3.5 NiO:0-1.5 Cr2O3