EP0302775A2
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A method for producing an elongated sintered article
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1988-07-28
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Granted: —
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Expires: 2008-07-28
Abstract
Abstract Improvement in a method for producing a sintered elongated article by the step comprising filling a metal pipe with a material powder, carrying out plastic deformation of the metal pipe and then subjecting the material powder in deformed metal pipe to sintering. In the invention, a netting of metallic wire (1) whose melting point is higher than a melting point of the material powder (3) is arranged around the metal pipe (2) before the sintering.
Inventors
- 👤 Susumu C/O Itami Works Of Yamamoto
- 👤 Nozomu C/O Itami Works Of Kawabe
- 👤 Shuji C/O Itami Works Of Yazu
- 👤 Tetsuji C/O Itami Works Of Jodai
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 09:26
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/01; H10N60/0268; H10N60/0801; C; C04; C04B; C04B35/00; C04B35/01; C04B35/45; C04B35/4504; C04B35/4512; C04B35/4521; C04B35/622; C04B35/64; Y; Y10; Y10S; Y10S505/00; Y10S505/70; Y10S505/704; Y10S505/705; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49014; Y10T29/49826; Y10T29/49906
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
86 words
In a method for producing a sintered elongated article by the steps comprising filling a metal pipe with a material powder, carrying out plastic deformation of the metal pipe filled with the material powder and then subjecting the deformed metal pipe filled with the material powder to heat-treatment at a sinter temperature of the material powder, improvement in that a netting of metallic wire whose melting point is higher than a melting point of the material powder is arranged around said metal pipe before the heat-treatment.
Claim 2
Dependent Claim
86 words
In a method for producing a sintered elongated article by the steps comprising filling a metal pipe with a material powder, carrying out plastic deformation of the metal pipe filled with the material powder and then subjecting the deformed metal pipe filled with the material powder to heat-treatment at a sinter temperature of the material powder, improvement in that a netting of metallic wire whose melting point is higher than a melting point of the material powder is arranged around said metal pipe before the heat-treatment.
Claim 3
Dependent Claim
18 words
A method set forth in Claim 1, characterized in that said metallic wire is made of stainless steel.
Claim 4
Dependent Claim
33 words
A method set forth in Claim 1 or 2, characterized in that said metal pipe is made of a metal selected from a group comprising Al, Cu, Ni, Ag, Fe and their alloys.
Claim 5
Dependent Claim
34 words
A method set forth in any one of Claim 1 to 3, characterized in that said plastic deformation is performed by wire-drawing by dies, wire-drawing by roller dies, wire-drawing by rolls, swaging, or extrusion.
Claim 6
Dependent Claim
28 words
A method set forth in any one of Claim 1 to 4, characterized in that said sintering temperature is higher than the melting point of the material pipe.
Claim 7
Dependent Claim
27 words
A method set forth in any one of Claim 1 to 5, characterized in that said metal pipe is annealed in the course of said plastic deformation.
Claim 8
Dependent Claim
75 words
A method set forth in any one of Claim 1 to 6, characterized in that said material powder is a powder mixture composed of a compound of an element α selected from IIa group of the Periodic Table, a compound of an element β selected from IIIa group of the Periodic Table, and a compound of an element γ selected from a group comprising Ib, IIb, IIIb, IVa and VIIIa groups of the Periodic Table.
Claim 9
Dependent Claim
32 words
A method set forth in Claim 7, characterized in that said material powder is a sintered powder which is prepared by sintering said powder mixture and then pulverizing the resulting sintered mass.
Claim 10
Dependent Claim
42 words
A method set forth in Claim 8, characterized in that the sintering of the powder mixture is carried out at temperature which is higher than 600 °C but is not higher than the melting point of the material powder to be sintered.
Claim 11
Dependent Claim
28 words
A method set forth in Claim 8 or 9, characterized in that a series of operations from the sintering to pulverization is repeated for more than two times.
Claim 12
Dependent Claim
110 words
A method set forth in any one of Claim 7 to 10, characterized in that said sintered powder is composed essentially of a compound oxide represented by the general formula: (α 1-x β x )Cu y O z in which α and β means the same definition as above, x is an atomic ratio of β with respect to (α+β) and has a range of 0.1 ≦ x ≦ 0.9, and y and z are respective atomic ratios with respect to (α 1-x β x ) which is considered to be equal to 1 and each satisfy ranges of 0.4 ≦ y≦ 3.0 and 1 ≦ z ≦ 5 respectively.
Claim 13
Dependent Claim
42 words
A method set forth in Claim 11, characterized in that said element α is Ba and said element β is at least one element selected from a group comprising Y, La, Gd, Dy, Ho, Er, Tm, Yb, Nd, Sm, Eu and Lu.
Claim 14
Dependent Claim
120 words
A method set forth in any one of Claim 1 to 6, characterized in that said powder material is a sintered powder composed essentially of a compound oxide represented by the formula: Θ₄(φ 1-q , Ca q ) m Cu n O p+r in which Θ stands for Bi or Tl, φ stands for Sr when Θ is Bi and stands for Ba when Θ is Tl, m and n are numbers each satisfying ranges of 6 ≦ m ≦ 10 and 4 ≦ n ≦ 8 respectively, p = (6+m+n), q is a number which satisfies a range of 0 < q < 1, and r is a number which satisfies a range of -2 ≦ r ≦ +2.
References Cited (Backward Citations)
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