Unlock instant, AI-driven research and patent intelligence for your innovation.

Method of coating abrasives

A coating, thermal coating technique applied to tantalum or, abrasive grit, carbide precursors to achieve high temperature effects

Inactive Publication Date: 2007-03-21
ELEMENT SIX LTD
View PDF2 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Another limitation is that these metals are metals typically found in the matrix used to hold coated diamond particles

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Diamond grit from ElementSix, 40 / 45 US mesh size, was CVD coated according to general methods generally known in the art, resulting in TiC-coated diamonds. CVD TiC-coated diamond was then used as the substrate for the second coating step.

[0039] 3000 carats of this TiC-coated diamond, 40 / 45 US mesh size, were placed into a magnetron sputter coater with a rotating cylinder and a large plate of pure titanium metal as the target. The coating chamber is evacuated, argon gas is admitted, and the power is turned on to form a plasma. The sputtering power was increased to 5000W while rotating the cylinder to ensure a uniform coating on all diamond particles. Two 160 minute sputtered titanium runs were continued with samples taken after the first run for analysis before continuing. The coated diamond is allowed to cool before being removed from the chamber.

[0040] After the second test, an analysis of the coated diamond was carried out by means of X-ray diffraction, X-ray...

Embodiment 2

[0043] CVD TiC-coated diamonds were produced as in Example 1. This TiC-coated diamond was then used as the substrate for the second coating step. 500 carats of this TiC-coated diamond, 40 / 45 US mesh size, were placed into a magnetron sputter coater with a rotating cylinder and a large plate of pure titanium metal as the target. The coating chamber is evacuated, argon gas is admitted, and the power is turned on to form a plasma. The sputtering power was increased to 5000W while rotating the cylinder to ensure a uniform coating on all diamond particles. Continue to sputter titanium metal for 120 minutes. The coated diamond is allowed to cool before being removed from the chamber.

[0044] The analysis of the coated diamond was carried out, consisting of X-ray diffraction, X-ray fluorescence, chemical determination of the coating, optical and scanning electron microscopy image analysis and particle breakage followed by cross-sectional analysis on the SEM .

[0045] To the na...

Embodiment 3

[0047] CVD TiC-coated diamonds were produced as in Example 1. This TiC-coated diamond was then used as a substrate for the coating. 1000 carats of this TiC-coated diamond, 40 / 45 US mesh size, were placed into a magnetron sputter coater with a rotating cylinder and a large plate of pure silicon metal as the target. The coating chamber is evacuated, argon gas is admitted, and the power is turned on to form a plasma. The sputtering power was increased to 5A (400V) on the target while rotating the cylinder to ensure a uniform coating on all diamond particles at 20 sccm argon pressure. Butane gas was admitted to achieve a pressure of 30 seem. The sputtering of silicon reacted with carbon was continued for 5 hours. The coated diamond is allowed to cool before being removed from the chamber.

[0048] The analysis of the coated diamond was carried out, consisting of X-ray diffraction, X-ray fluorescence, chemical determination of the coating, optical and scanning electron microsco...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

A method of producing coated ultra-hard abrasive material, in particular coated diamond and CBN material. In a first step, an element capable of forming (singly or in combination) carbides, nitrides or borides to the surface(s) of the abrasive material is is applied using a hot coating process. At least one outer layer of a coating material selected from the group comprising transition metals, carbide, nitride, boride, oxide and carbonitride forming metals, metal carbides, metal nitrides, metal borides, metal oxides and metal carbonitrides, boronitrides and borocarbonitrides is applied over the inner layer by physical vapour deposition or chemical vapour deposition. Typically the inner layer elements come from groups IVa, Va, VIa, IIIb and IVb of the periodic table and include, for example, vanadium, molybdenum, tantalum, indium, zirconium, niobium, tungsten, aluminium, boron and silicon. The outer coating is preferably applied by reactive sputtering where a reactive gas is admitted to the sputtering chamber, resulting in the deposition of a compound of the reactive gas and the element being sputtered.

Description

Background of the invention [0001] The present invention relates to coated superabrasive materials, particularly methods of abrasive grit. [0002] Abrasive grits, such as diamond and cubic boron nitride grains, are widely used in sawing, drilling, grinding, polishing and other grinding and cutting applications. In these applications, the sand grains are usually surrounded by a matrix consisting of metals such as Fe, Co, Ni, Cu and their alloys (metal bond). Alternatively, a resinous (resin bond) or vitreous (glass bond) matrix may be used, with the choice of matrix being a function of the particular application in which the abrasive will be used. [0003] The use of abrasive grits in the manufacture of abrasive tools is not without problems. During the manufacture of cutting tools, such as during sintering of saw components containing diamond particles, oxygen may be present, either as dissolved oxygen in the metal powder forming the bond matrix or in gaseous form in the at...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/14B24D11/00B24D18/00C04B41/45C04B41/52
CPCB24D18/0018C09K3/1436B24D11/001C09K3/1445C04B41/52C04B41/4584C09G1/02
Inventor D·P·伊根J·A·安吉尔斯M·L·菲什
Owner ELEMENT SIX LTD