Claims
- 1. A wire die comprising an annularly shaped diamond body with a central opening having an interior surface with a uniform diameter, said body comprising diamond grains having columar growth extending in a radial direction from said interior surface wherein said diamond grains are smaller near said interior surface and larger with increasing distance along a radial direction away from said interior surface, said diamond grains having plurality of grain boundaries adjacent said interior surface.
- 2. A wire die according to claim 1 consisting essentially of a symmetrical cylinder of chemically vapor-deposited diamond having a uniform inner diameter which varies by less than 0.1% in dimension along the cylinder length.
- 3. A wire die according to claim 1 wherein said uniform inner diameter is in the range of 0.025 to 2.5 mm and varies by less than 0.1% in dimension along the length thereof, said annularly shaped body has a wall thickness in the range of 1-2,000 .mu.m, and a particle size distribution gradient along the tube wall thickness.
- 4. A wire die according to claim 1 wherein said diamond grains are deposited diamond.
- 5. A wire die according to claim 4 wherein said diamond grains are deposited by a hot filament process.
Parent Case Info
This is a divisional of copending application Ser. No. 07/832,300 filed on Feb. 7, 1992, now abandoned.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
4707384 |
Schachner et al. |
Nov 1987 |
|
5130111 |
Pryor |
Jul 1992 |
|
5133332 |
Tanaka et al. |
Jul 1992 |
|
Foreign Referenced Citations (4)
Number |
Date |
Country |
0437830A1 |
Jul 1991 |
EPX |
0442303A1 |
Aug 1991 |
EPX |
0467634A2 |
Jan 1992 |
EPX |
62-296707 |
May 1989 |
JPX |
Non-Patent Literature Citations (1)
Entry |
Emerging Technology of Diamond Thin Films/Chemical & Engineering News, Vo. 67, NI. 20, pp. 24-39, 1989. |
Divisions (1)
|
Number |
Date |
Country |
Parent |
832300 |
Feb 1992 |
|