摘要:
A magnetizable abrasive particle is presented. The magnetizable abrasive particle has a ceramic particle having an outer surface. The magnetizable abrasive particle also has a magnetic coating layer applied to the outer surface of the ceramic particle prior to sintering. The sintered magnetizable particle is responsive to a magnetic field.
摘要:
Methods of making ceramics, including ceramic abrasive particles, comprising alumina (in some embodiments, alpha alumina). The ceramic abrasive particles can be incorporated into a variety of abrasive articles, including bonded abrasives, coated abrasives, nonwoven abrasives, and abrasive brushes.
摘要:
A method of making abrasive particles includes: providing a slurry comprising non-colloidal solid particles and a liquid vehicle; forming at least a portion of the slurry into shaped bodies contacting a substrate; at least partially drying the shaped bodies to provide shaped abrasive precursor particles; separating at least a portion of the shaped abrasive precursor particles from the substrate; and converting at least a portion of the shaped abrasive precursor particles into shaped abrasive particles. The shaped abrasive particles comprise alpha alumina having an average crystal grain size of 0.8 to 8 microns and an apparent density that is at least 92 percent of the true density. Each shaped abrasive particle has a respective surface comprising a plurality of smooth sides that form at least four vertexes. Shaped abrasive particles, abrasive articles including them, and methods of using are also disclosed.
摘要:
Armor composites and methods of making armor composites comprising a first layer comprising a glass-ceramic, a force dissipating material, and a bond that affixes at least a portion of the first layer to the second layer.
摘要:
A plurality of granules comprising ceramic particles bound together with an inorganic binder, the inorganic binder comprising reaction product of at least alkali silicate and hardener, wherein the ceramic particles are present as at least 50 percent by weight of each granule, based on the total weight of the respective granule, wherein each granule has a total porosity in a range from greater than 0 to 50 percent by volume, based on the total volume of the respective granule, and wherein the granule has a minimum Total Solar Reflectance of at least 0.7. The granules are useful, for example, as roofing granules.
摘要:
A metal matrix composite is provided, including a metal, inorganic particles, and discontinuous fibers. The inorganic particles and the discontinuous fibers are dispersed in the metal. The metal includes aluminum, magnesium, or alloys thereof. The inorganic particles have an envelope density that is at least 30% less than a density of the metal. The metal matrix composite has a lower envelope density than the matrix metal while retaining a substantial amount of the mechanical properties of the metal.
摘要:
Described herein is a bead-coated sheet and methods of making wherein a sheet substrate selected from a metal, a glass, and/or a glass-ceramic, comprises a layer of microspheres that are partially embedded into the surface of the sheet substrate such that a portion of each of the microspheres projects outwardly from the surface of the sheet substrate.
摘要:
A method of making a porous metal matrix composite is provided. The method includes mixing a metal powder, a plurality of inorganic particles, and a plurality of discontinuous fibers to form a mixture, wherein the metal powder comprises aluminum, magnesium, an aluminum alloy, or a magnesium alloy. The method further includes sintering the mixture to form the porous metal matrix composite. Typically, the inorganic particles comprise porous particles or ceramic bubbles or glass bubbles, and the inorganic particles and the discontinuous fibers are dispersed in the metal. The metal matrix composite has a lower density than the metal and an acceptable yield strength.
摘要:
A moldable article, including at least a container made of a barrier material, the container providing an interior space within which a plurality of glass particles are contained. The glass has a glass transition temperature and a crystallization onset temperature, the difference between the glass transition temperature and the crystallization onset temperature is at least about 5°K, and the glass is composed of at least two metal oxides, from 0 to less than 20% by weight SiO 2 , from 0 to less than 20% by weight B 2 O 3 , and from 0 to less than 40% by weight P 2 O 5 . The moldable article protects the glass particles by keeping them clean and moisture free prior to a molding operation. A method of making a moldable article includes: removing entrapped moisture from a plurality of glass particles, placing glass particles in a receptacle, and sealing the receptacle to form the article. The moldable article may be placed in a mold and, during the molding process, the barrier material essentially burns off while the glass particles coalesce into a molded article.
摘要翻译:一种可塑制品,其至少包括由阻隔材料制成的容器,该容器提供内部空间,内部空间内容纳有多个玻璃颗粒。 该玻璃具有玻璃化转变温度和结晶起始温度,玻璃化转变温度和结晶起始温度之差至少约为5°K,玻璃由至少两种金属氧化物组成,从0至小于 20重量%的SiO 2,0至小于20重量%的B 2 O 3,和0至小于40重量% 以重量计的P 2 O 5。 可模塑制品在模制操作之前通过保持它们清洁和不含水分而保护玻璃颗粒。 一种制造可模塑制品的方法包括:从多个玻璃颗粒中去除残留的水分,将玻璃颗粒放入容器中,并密封容器以形成制品。 可模塑制品可放置在模具中,并且在模制过程中,阻隔材料基本上被烧掉,而玻璃颗粒聚结成模制品。 p>
摘要:
A method for making an article from glass comprises providing a substrate including an outer surface; providing at least a first glass comprising at least two different metal oxides, wherein the first glass has a T g and T x , and wherein the difference between the T g and the T x of the first glass is at least 5K, the first glass containing less than 20% by weight SiO 2 , less than 20% by weight B 2 O 3 , less than 40% by weight P 2 O 5 , and less than 50% by weight PbO; heating the first glass at or below ambient pressure to above its T g such that at least a portion of the glass wets at least a portion of the outer surface of the substrate; and cooling the glass to provide an article comprising ceramic comprising the glass attached to the at least a portion of the outer surface of the substrate. The porosity of the ceramic is less than 20% by volume.
摘要翻译:从玻璃制造制品的方法包括提供包括外表面的基材; 提供至少一种包含至少两种不同金属氧化物的第一玻璃,其中所述第一玻璃具有T N和T x X,并且其中T < 第一玻璃的第一玻璃的含量为至少5K,第一玻璃含有小于20重量%的SiO 2,小于20重量%的SiO 2 重量B 2 O 3,小于40重量%P 2 O 5 O 5,小于50重量% PbO; 将第一玻璃加热到环境压力以下或低于环境压力,使其至少部分玻璃浸入基材外表面的至少一部分; 以及冷却所述玻璃以提供包括陶瓷的制品,所述陶瓷包括附着在所述基材的外表面的至少一部分上的所述玻璃。 陶瓷的孔隙率小于20体积%。