摘要:
Composite particle having an abrasive grit with a ceramic material thereon. Composite particles can be incorporated, for example, into a variety of abrasive articles.
摘要:
A method and apparatus for using fixed abrasive polishing pads that contain posts for chemical mechanical polishing (CMP). The posts have different shapes, different sizes, different heights, different materials, different distribution of abrasive particles and different process chemicals. This invention also includes preconditioning fixed abrasive articles comprising a plurality of posts so that the posts have equal heights above the backing to achieve a uniform texture. This invention relates to improvements with respect to in situ rate measurement (ISRM) devices. The invention resides in providing a mechanical means, such as a notch, to determine when approaching the end of the abrasive web roll. The invention resides in coding the web throughout its length to enable determining the location of different portions of the web. This invention resides in providing perforations in the sides or end of the web for improved handling.
摘要:
Disclosed are a mixture of a stone polishing pad, a stone polishing pad made of the mixture and a method for manufacturing the stone polishing pad. Instead of planar structure, the stone polishing pad has polishing protrusions and an uneven surface formed on the surface of the polishing protrusions that contacts with the polished object. The stone polishing pad is formed by charging a mould with the mixture of the stone polishing pad that includes cork powder, and forming the same under high temperature and high pressure.
摘要:
A superabrasive tool such as a superabrasive grindstone (101; 102), a superabrasive dresser (103; 104; 105) or a superabrasive lap surface plate (106) includes a base (20) of steel and a superabrasive layer (10) formed on the base (20). The superabrasive layer (10) includes superabrasive grains (11) consisting of diamond grains, cubic boron nitride grains or the like and a holding layer consisting of a nickel plating layer (16) and a bond layer (17), or a brazing filler metal layer (18), holding the superabrasive grains (11) and fixing the same onto the base (20). Grooves (12) or holes (14) are formed on flat surfaces (19) of the superabrasive grains (11) exposed from the holding layer (16, 17; 18). The holding layer (16, 17; 18) holding and fixing the superabrasive grains (11) so that the surfaces of the grains are partially exposed is formed on the base (20). The grooves (12) or the holes (14) are formed by irradiating the surfaces of the superabrasive grains (11) exposed from the holding layer (16, 17; 18) with a laser beam (50). Working of high accuracy can be performed by forming the grooves (12) or the holes (14) on the surfaces of the superabrasive grains (11).
摘要:
Method for making alpha alumina-based abrasive grain from a dispersion comprising boehmite. The abrasive grain can be incorporated into abrasive products such as coated abrasives, bonded abrasives, and non-woven abrasives.
摘要:
Abrasive tools with a mixture of more than 9% but less than about 65% superabrasive and from about 56% down to 0.5% of a microcrystalline alumina in a bond material show surprising advantages.
摘要:
Composite articles, cutting tools, and wear parts are prepared by densification of a mixture comprising alumina whiskers, chopped fibers, or particles uniformly distributed in a titanium diboride matrix. Optionally, other dispersoids may also be incorporated. The preferred composite article or cutting tool has a fracture toughness equal to or greater than about 2.5 MN/m.sup.3/2. Methods of preparation and use are also presented.
摘要:
Microcrystalline boehmite suitable for conversion to anhydrous alumina products is produced by hydrothermal treatment of precursor alumina raw material at controlled pH and in the presence of microcrystalline boehmite seed material. Reaction mix may include submicron seed material for seedling for later conversion of the microcrystalline boehmite to alpha alumina. Removal of metal cations by ion exchange is employed when high purity product is required. Other materials may be added to reaction mix. Production of alumina products, catalysts, and ceramic bodies is disclosed.
摘要:
A method of producing a magnetic disk by lapping a magnetic disk medium, comprising the steps of:preparing a lapping tape having an abrasive particle layer provided with abrasive particle clusters and chip pockets formed between adjacent two clusters, each of said clusters having abrasive particles of Al.sub.2 O.sub.3 or SiC and abrasive particles of diamond,lapping the surface of said magnetic disk medium by using the thus prepared lapping tape.
摘要翻译:一种通过研磨磁盘介质制造磁盘的方法,其特征在于包括以下步骤:制备具有研磨颗粒层的研磨带,所述磨料颗粒层在相邻的两个团簇之间形成有研磨颗粒簇和碎屑袋,每个所述簇具有磨粒 Al 2 O 3或SiC和金刚石磨料颗粒,通过使用如此制备的研磨带研磨所述磁盘介质的表面。
摘要:
A method is provided for making improved molded abrasive tools by applying centifugal force and/or vibratory action to the abrasive particles during the molding operation. The abrasive is thereby forced and/or sifted preferentially into a closely packed surface layer with close conformity to the mold surface.