Multi-part abrasive tools are disclosed herein. In one embodiment, an abrasive tool includes a first body, a second body, and a braze layer that couples the first body to the second body. The braze layer includes a braze alloy having a liquidus temperature and insoluble particles at least partially surrounded by the braze alloy. The insoluble particles are insoluble with the braze alloy at temperatures at least 100° C. above the liquidus temperature of the braze alloy.

An abrasive article including a bonded abrasive body having a certain Homogeneity Factor and a multimodal distribution of abrasive particle sizes where the particles size of a first mode is no greater than 80% of a particle size of a second mode. The bonded body can also have a consistent hardness throughout the body.

A method for manufacturing a bonded abrasive article is presented. The method includes preparing a bondable abrasive composition including abrasive particles, a binder medium and an environmentally benign pore inducing material. The environmentally benign pore inducing material is nonflammable. The method also includes forming a precursor abrasive structure from the bondable abrasive composition. The method also includes removing the pore inducing material from the precursor abrasive structure to provide a porous precursor abrasive structure. The method also includes processing the porous precursor abrasive structure to provide a bonded abrasive article.

Systems and methods include providing a coated abrasive article with an enhanced anti-loading composition in a supersize coat. The anti-loading composition includes a mixture of a metal stearate, at least one performance component, and a polymeric binder composition.

Methods for manufacturing bonded abrasive articles, for example vitrified bonded grinding wheels. A bondable abrasive composition is prepared including abrasive particles, a binder medium and a gamma-pyrone pore inducing material, such as ethyl maltol. A precursor abrasive structure is formed from the composition. The gamma-pyrone pore inducing material is removed from the precursor abrasive structure to provide a porous precursor abrasive structure that is further processed to provide a bonded abrasive article. In some embodiments, the binder medium includes a vitreous bonding material, and the bonded abrasive article is a porous vitrified bonded grinding wheel.

Various embodiments disclosed relate to an abrasive article and method of forming abrasive articles using backfill to secure orientation of shaped abrasive particles. An example method includes aligning a plurality of shaped abrasive particles into a pattern, and transferring the pattern to a backing substrate containing a layer of adhesive. Prior to curing the adhesive, a plurality of backfill particles are transferred to the backing substrate, where at least some of the plurality of backfill particles are disposed between the plurality of shaped abrasive particles.

A vitrified grinding stone having an open and homogeneous structure in which an abrasive grain and an inorganic hollow filler are bonded by an inorganic bonding agent, the abrasive grain is filled at a proportion by volume fraction of 23 to 35 vol %, and has homogeneity with a standard deviation of 10 or less in a frequency distribution chart of an area ratio of an abrasive grain, which is a distribution chart of proportions of a solid matter including the abrasive grain per unit area at a plurality of locations in a cross section of the vitrified grinding stone.

A coated abrasive article comprises a backing having first and second opposed major surfaces. A make layer is bonded to the first major surface. Agglomerate grinding aid particles are directly bonded to the make layer. At least a portion of the agglomerate grinding aid particles comprise grinding aid particles retained in a binder, and are arranged according to an open predetermined pattern. Abrasive particles are directly bonded to the make layer in spaces between the agglomerate grinding aid particles. A size layer is directly bonded to the make layer, agglomerate grinding aid particles, and abrasive particles. A method of making a coated abrasive article, in which the agglomerate grinding aid particles are deposited onto a curable make layer precursor prior to depositing abrasive particles onto the curable make layer precursor in spaces between the agglomerate grinding aid particles is also disclosed.

Disclosed are an additive raw material composition and an additive for superhard material product, a composite binding agent, a superhard material product, a self-sharpening diamond grinding wheel and a method for manufacturing the same. The raw material composition consisting of components in following mass percentage: Bi.sub.2O.sub.3 25%˜40%, B.sub.2O.sub.3 25%˜40%, ZnO 5%˜25%, SiO.sub.2 2%˜10%, Al.sub.2O.sub.3 2%˜10%, Na.sub.2CO.sub.3 1%˜5%, Li.sub.2CO.sub.3 1%˜5%, MgCO.sub.3 0%˜5%, and CaF.sub.2 1%˜5%. The composite binding agent is prepared from the additive and a metal composite binding agent. The self-sharpening diamond grinding wheel prepared from the composite binding agent has high self-sharpness, high strength, and fine texture, is uniformly consumed during the grinding process, does not need to be trimmed during the process of being used, and maintains good grinding force all the time, fundamentally solving the problems of long trimming time and high trimming cost of the diamond grinding wheel (FIG. 1).

Systems and methods include providing a coated abrasive article with an enhanced anti-loading composition in a supersize coat. The anti-loading composition includes a mixture of a metal stearate, at least one performance component, and a polymeric binder composition.