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US4598053A Expired / Lapsed US ⏱️ 0.0 years remaining

Ceramic compacts

Assignee: Sumitomo Electric Industries Ltd
•
Filing: 1985-02-27
•
Granted: 1986-07-01
•
Expires: 2005-02-27
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Abstract

Abstract A ceramic compact having a high transverse rupture strength is provided by a low cost sintering method. This ceramic compact comprises 55 to 96% by volume of a first component, 4 to 45% by volume of a second component and at most 3% by volume of unavoidable impurities: First Component: ZrO2 consisting of at least 80% by weight of at least one of tetragonal system and cubic system and the balance of mono-clinic system, in which at least one member selected from the group consisting of oxides of Group IIIa (Including Sc, Y, La) elements of the Periodic Table, CaO, MgO, and mixtures thereof are dissolved to form a solid solution. Second Component: at least one member selected from the group consisting of carbonitrides, oxycarbides, oxynitrides and carboxynitrides of group IVa (Including Ti, Zr, Hf), Va (Including V, Nb, Ta) and VIa (Including Cr, Mo, W) elements of the Periodic Table, and mixtures or solid solutions thereof.

Inventors

  • 👤 Akira Yamakawa
  • 👤 Eiji Kamijo

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 09:59
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/48; C04B35/486

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 127 words
A ceramic compact consisting essentially of 55 to 96% by volume of a first component, 4 to 45% by volume of a second component and at most 3% by volume of unavoidable impurities: First Component: ZrO 2 consisting of at least 80% by weight of at least one of tetragonal system and cubic system and the balance of monoclinic system, in which at least one member selected from the group consisting of oxides of Group IIIa elements of the Periodic Table, CaO, MgO, and mixtures thereof are dissolved to form a solid solution, Second Component: at least one member selected from the group consisting of carbonitrides, oxycarbides, oxynitrides and carboxynitrides of Group IVa, Va and VIa elements of the Periodic Table, and mixtures or solid solutions thereof.
Claim 2
Dependent Claim 127 words
A ceramic compact consisting essentially of 55 to 96% by volume of a first component, 4 to 45% by volume of a second component and at most 3% by volume of unavoidable impurities: First Component: ZrO 2 consisting of at least 80% by weight of at least one of tetragonal system and cubic system and the balance of monoclinic system, in which at least one member selected from the group consisting of oxides of Group IIIa elements of the Periodic Table, CaO, MgO, and mixtures thereof are dissolved to form a solid solution, Second Component: at least one member selected from the group consisting of carbonitrides, oxycarbides, oxynitrides and carboxynitrides of Group IVa, Va and VIa elements of the Periodic Table, and mixtures or solid solutions thereof.
Claim 3
Dependent Claim 17 words
The ceramic compact as claimed in claim 1, wherein the second component does not contain Ti element.
Claim 4
Dependent Claim 32 words
The ceramic compact as claimed in claim 1, wherein the first component contains Y 2 O 3 as the Group IIIa element oxide in a proportion of 2.5 to 7.5 mol %.
Claim 5
Dependent Claim 52 words
The ceramic compact as claimed in claim 1, wherein the second component is a solid solution represented by the formula M(C.sub.1 N.sub.m O.sub.n).sub.z wherein M is at least one member selected from the group consisting of Group IVa, Va and VIa elements of the Periodic Table, l+m+n=1, l+m≠0, m+n≠0, l+n≠0 and 1.2>z>0.5.

References Cited (Backward Citations)

US3740340A Cited
JPS5423611A Cited
JPS55140762A Cited
US4366254A Cited
JPS57140370A Cited
JPS5832067A Cited
JPS58120571A Cited
JPS58181766A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1989-06-30 1989-12-30 1990-07-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1993-06-30 1993-12-30 1994-07-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1997-06-30 1997-12-30 1998-07-01 $7700.00 Window Closed / Lapsed

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