Patent US4885131A successfully refreshed from Google Patents.
US4885131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing self-supporting bodies and products produced thereby
Assignee: Lanxide Technology Co LP
•
Filing: 1989-01-13
•
Granted: 1989-12-05
•
Expires: 2009-01-13
Abstract
Abstract Self-supporting bodies are produced by reactive infiltration of a parent metal into a boron donor material and a carbon material. The reactive infiltration typically results in a composite comprising a boron-containing compound, a carbon-containing compound and residual metal, if desired. The mass to be infiltrated may contain one or more inert fillers admixed with the boron donor material and carbon donor material. The relative amounts of reactants and process conditions may be altered or controlled to yield a body containing varying volume percents of ceramic, metal, ratios of one ceramic to another and porosity.
Inventors
- 👤 Marc S. Newkirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:28
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/56; C04B35/5607; C04B35/5611; C04B35/5622; C04B35/5805; C04B35/58064; C04B35/58071; C04B35/58078; C04B35/622; C04B35/64; C04B35/65; C04B35/652; C22; C22C; C22C1/00; C22C1/10; C22C1/1036; C22C1/1057
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
133 words
A method for producing a self-supporting body, comprising: selecting a parent metal; heating said parent metal in a substantially inert atmosphere to a temperature above its melting point to form a body of molten parent metal; contacting said body of molten parent metal with a permeable mass comprising of a boron donor material and a carbon donor material; maintaining said temperature for a time sufficient to permit infiltration of molten parent metal into said permeable mass and to permit reaction of said molten parent metal with each of said boron donor material and said carbon donor material to form at least one boron-containing compound and at least one carbon-containing compound; and continuing said infiltration and reaction for a time sufficient to produce said self-supporting body comprising at least one parent metal boron-containing compound.
Claim 2
Independent Claim
133 words
A method for producing a self-supporting body, comprising: selecting a parent metal; heating said parent metal in a substantially inert atmosphere to a temperature above its melting point to form a body of molten parent metal; contacting said body of molten parent metal with a permeable mass comprising of a boron donor material and a carbon donor material; maintaining said temperature for a time sufficient to permit infiltration of molten parent metal into said permeable mass and to permit reaction of said molten parent metal with each of said boron donor material and said carbon donor material to form at least one boron-containing compound and at least one carbon-containing compound; and continuing said infiltration and reaction for a time sufficient to produce said self-supporting body comprising at least one parent metal boron-containing compound.
Claim 3
Dependent Claim
27 words
The method according to claim 1, wherein said parent metal comprises a metal selected from the group consisting of titanium, zirconium, hafnium, vanadium, chromium, aluminum and niobium.
Claim 4
Dependent Claim
22 words
The method according to claim 1, wherein said parent metal comprises zirconium and a ratio of ZrB 2 /ZrC is about 1.
Claim 5
Dependent Claim
13 words
The method according to claim 1, wherein said parent metal comprises titanium/zirconium alloy.
Claim 6
Dependent Claim
27 words
The method according to claim 1, wherein said boron donor material and said carbon donor material are present in a molar ratio of about 4 boron/1 carbon.
Claim 7
Dependent Claim
16 words
The method according to claim 1, wherein the molar ratio of boron to carbon exceeds 4/1.
Claim 8
Dependent Claim
13 words
The method of claim 1, wherein the carbon/boron ratio is greater than 1/4.
Claim 9
Dependent Claim
34 words
The method according to claim 1, wherein said self-supporting comprises a parent metal boride compound and a parent metal carbide compound, formed upon reaction of said boron and carbon sources and said parent metal.
References Cited (Backward Citations)
US3758662A
Cited
US3864154A
Cited
GB1492477A
Cited
US4492670A
Cited
US4544524A
Cited
US4585618A
Cited
US4595595A
Cited
US4713360A
Cited
EP0165707A2
Cited
US4692418A
Cited
EP0193292A2
Cited
US4605440A
Cited
US4606768A
Cited
US4702770A
Cited
EP0239520A1
Cited
US4777014A
Cited
US4718941A
Cited
US4971059A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-04 | 1993-06-05 | 1993-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-04 | 1997-06-05 | 1997-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-04 | 2001-06-05 | 2001-12-05 | $7700.00 | Window Closed / Lapsed |