IMPROVED DIAMOND POLISHING THROUGH AN ION IMPLANTATION ASSISTED TECHNIQUE

Award Information
Agency:
National Science Foundation
Amount:
$49,949.00
Program:
SBIR
Contract:
N/A
Solitcitation Year:
N/A
Solicitation Number:
N/A
Branch:
N/A
Award Year:
1992
Phase:
Phase I
Agency Tracking Number:
17422
Solicitation Topic Code:
N/A
Small Business Information
Spire Corp
One Patriots Park, Bedford, MA, 01730
Hubzone Owned:
N
Woman Owned:
N
Socially and Economically Disadvantaged:
N
Duns:
N/A
Principal Investigator
 Piran Sioshansi
 Section Manager
 (617) 275-6000
Business Contact
Phone: () -
Research Institution
N/A
Abstract
DIAMOND, BECAUSE OF ITS HARDNESS, CHEMICAL INERTNESS, OPTICAL TRANSPARENCY OVER A WIDE RANGE OF WAVELENGTHS, THERMAL CONDUCITIVITY, AND ELECTRICAL RESISTIVITY, IS AN EDCELLENT MATERIAL FOR MANY APPLICATIONS. SYNTHETIC DIAMONDAND DIAMOND FILMS HAVE BEEN SUGGESTED FOR USE AS ABRASIVES, BEARING AND WEAR RESISTANT SURFACES, TOOL COATINGS, HEAT SINKS, AND OPTICAL COATINGS AND WINDOWS. CHEMICAL VAPOR DEPOSITION (CVD) AND RELATED PROCESSES HAVE BEEN DEVELOPED AS A MEANS OF PRODUCING SYNTHETIC DIAMOND AT RELATIVELY LOW TEMPERATURES AND PRESSURES. HOWEVER, IN SPITE OF RECENT PROGRESS, CVD DIAMOND IS LESS THAN SATISFACTORY BECAUSE THE DEPOSITS ARE POLYCRYSTALLINE IN FORM WITH GRAINS OF VARYING SIZES AND ORIENTATIONS. THIS LIMITS THE USE OF DIAMOND IN SEVERAL APPLICATIONS. POLISHING OF DIAMOND FILMS WITH DIAMOND PARTICLES CAN BE USED TO IMPROVE THE FILMS, BUT THE POLISHING PROCESS IS LONG AND EXPENSIVE, AND DOES NOT PRODUCE IDEAL RESULTS. FURTHERMORE, DURING MECHANICAL POLISHING, GRAINS IN THE FILM FREQUENTLY BECOME DISLODGED, EXTENDING THE NECESSARY POLISHING TIME. ION IMPLANTATION OF DIAMOND AND POLYCRYSTALLINE DIAMOND CREATES SUBSTANTIAL RADIATION DAMAGE, AMORPHIZATION, AND ULTIMATELY GRAPHITIZATION. THE ION BOMBARDED LAYERS CREATEDON DIAMOND SUBSTRATES ARE SUBSTANTIALLY SOFTER THAN THE BULKMATERIAL, AND ARE THEREFORE MUCH EASIER TO POLISH. THIS PROJECT WILL PROVIDE A PROOF-OF-PRINCIPLE STUDY, DEMONSTRATING A PROCESS FOR POLISHING POLYCRYSTALLINE DIAMOND WHICH CONSISTS OF ION IMPLANTATION FOLLOWED BY MECHANICAL POLISHING. OPTICAL QUALITY FINISHES SIGNIFICANTLY BETTER THAN THOSE WHICH CAN BE OBTAINED FROM MECHANICAL POLISHING ALONE ARE PRODUCED BY SUCH SEQUENTIAL IMPLANTATION AND POLISHING; IT IS ANTICIPATED THAT THIS PROCESS WILL SIGNIFICANTLY SIMPLIFY THE POLISHING OF POLYCRYSTALLINE DIAMOND.

* information listed above is at the time of submission.

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