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.

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.

The invention provides a float trowel blade attachment for cement floor finishers comprising a rectangular section of sheet metal having a top surface and a bottom surface and having its edges optionally bent upwardly, means for providing to the top surface a three-sided rearwardly open pocket on the back of the section adjacent the leading edge thereof adapted to partially receive a finish trowel blade of the finisher, a spring clip secured to the top surface or the pocket-forming means and extending rearwardly therefrom so as to be engageable with the finish trowel blade to retain the section thereon, and wherein said rectangular sheet metal has attached to its bottom surface using an adhesive or mechanical attachment material interlayer, a composite rigid abrasive element bonded to a resilient backing and wherein said abrasive element comprises a substrate of two or more non woven layers pads including holes for inserting grinding and polishing elements.

The invention provides a float trowel blade attachment for cement floor finishers comprising a rectangular section of sheet metal having a top surface and a bottom surface and having its edges optionally bent upwardly, means for providing to the top surface a three-sided rearwardly open pocket on the back of the section adjacent the leading edge thereof adapted to partially receive a finish trowel blade of the finisher, a spring clip secured to the top surface or the pocket-forming means and extending rearwardly therefrom so as to be engageable with the finish trowel blade to retain the section thereon, and wherein said rectangular sheet metal has attached to its bottom surface using an adhesive or mechanical attachment material interlayer, a composite rigid abrasive element bonded to a resilient backing and wherein said abrasive element comprises a substrate of two or more non woven layers pads including holes for inserting grinding and polishing elements.

A method for producing a tool with a diamond-studded tool head includes the steps of providing a tool shank and fixing a support element to a free end of the tool shank. The method further includes the steps of applying a layer of material interspersed with diamonds at least in sections to the support element and to a section of the tool shank adjoining the support element, and at least partially removing the support element, so that the layer of material interspersed with diamonds forms a tool head which in cross-section has the form of a circular ring and has a front-side recess.

A novel diamond cutting tool and its use in cutting and grinding applications. The cutting surface of the tool is composed of an aluminum/diamond metal matrix composite comprising diamond particles dispersed in a matrix of aluminum or an aluminum alloy, and wherein the diamond particles have thin layers of beta-SiC chemically bonded to the surfaces thereof.

A novel diamond cutting tool and its use in cutting and grinding applications. The cutting surface of the tool is composed of an aluminum/diamond metal matrix composite comprising diamond particles dispersed in a matrix of aluminum or an aluminum alloy, and wherein the diamond particles have thin layers of beta-SiC chemically bonded to the surfaces thereof.

A method for producing a tool with a diamond-studded tool head includes the steps of providing a tool shank and fixing a support element to a free end of the tool shank. The method further includes the steps of applying a layer of material interspersed with diamonds at least in sections to the support element and to a section of the tool shank adjoining the support element, and at least partially removing the support element, so that the layer of material interspersed with diamonds forms a tool head which in cross-section has the form of a circular ring and has a front-side recess.

An abrasive particle can include a body including abrasive particles contained in a bond matrix. The bond matrix can include a first phase and a second phase. In an embodiment, the body can have a Microstructure Feature of greater than 1 and a Non-Bond Value of not greater than 50%. In another embodiment, the body can include a Microstructure Feature including a Spacing Value of at least 0.01.

An abrasive particle can include a body including abrasive particles contained in a bond matrix. The bond matrix can include a first phase and a second phase. In an embodiment, the body can have a Microstructure Feature of greater than 1 and a Non-Bond Value of not greater than 50%. In another embodiment, the body can include a Microstructure Feature including a Spacing Value of at least 0.01.