Composite body

Patent metadata

Field	Value
Publication number	US-2018148853-A1
Application number	US-201515575587-A
Country	US
Kind code	A1
Filing date	Dec 11, 2015
Priority date	May 18, 2015
Publication date	May 31, 2018
Grant date	—

Abstract

A composite body has a cermet member, a metal member and an intermediate member. The cermet member includes a cermet oxide phase and a cermet metal phase. The cermet oxide phase contains a Ni-containing oxide or an Fe-containing oxide. The cermet metal phase contains Ni. The intermediate layer contains Cu. The mass proportions of Cu in the cermet metal phase at points which are spaced apart by 10, 50, 100 and 1000 μm from the interface between the cermet member and the intermediate layer to the cermet member side are denoted by C10, C50, C100 and C1000 (mass %). When the mass proportions of Cu in the cermet oxide phase at points which are spaced apart by 10 and 100 μm from the interface to the cermet member side are denoted by M10 and M100 (mass %), C10>C50>C100>C1000, and 5>M10−M100>−5.

First claim

1 . A composite body comprising a cermet member, a metal member, and an intermediate layer, wherein
said cermet member includes a cermet oxide phase and a cermet metal phase, said cermet oxide phase includes an oxide including Ni or an oxide including Fe, said cermet metal phase includes Ni, said intermediate phase includes Cu, and when mass ratios of Cu in said metal phase at positions away by 10, 50, 100, 1000 μm from a boundary between said cermet member and said intermediate layer towards said cermet member are defined as C10, C50, C100 and C1000 (mass %), and also when mass ratios of Cu in said oxide phase at positions away by 10 and 100 μm from said boundary towards said cermet member side are defined as M10 and M100 (mass %), then following equation 1 and equation 2 are satisfied simultaneously.
C10>C50>C100>C1000 (mass %):  (Equation 1)

5>M10−M100>−5 (mass %):  (Equation 2)

2 . The composite body as set forth in claim 1 , wherein said metal member at least includes Ni.

3 . The composite body as set forth in claim 1 , wherein when the mass ratio of Ni and Cu in said intermediate layer are expressed in terms of percentage, Ni is 10<Ni<70 (mass %) and Cu is 30<Cu<90 (mass %).

4 . The composite body as set forth in claim 1 , wherein said intermediate layer at least comprises a first intermediate layer and a second intermediate layer,
said first intermediate layer is bonded to said cermet member, said first intermediate layer at least includes Cu as a first metal, said second intermediate layer at least includes M2 as a second metal, a melting point of Cu as said first metal is lower than the melting point of M2 as said second metal, a mass concentration of Cu in said first intermediate layer is higher than the mass concentration of Cu in the said second intermediate layer, and said mass concentration of M2 in said second intermediate layer is higher than the mass concentration of M2 in said first intermediate layer.

5 . The composite body as set forth in claim 4 , wherein said first intermediate layer is also bonded to said second intermediate layer.

6 . The composite body as set forth in claim 4 , wherein said second intermediate layer is also bonded to said metal member.

7 . The composite body as set forth in claim 4 , wherein a mass ratio between Cu and M2 (Cu/M2) in said first intermediate layer is within the range of below equation 3.
40/60≤Cu/M2≤90/10:  (Equation 3)

8 . The composite body as set forth in claim 4 , wherein M2 is Ni.

9 . The composite body as set forth in claim 4 , wherein said intermediate layer comprises a third intermediate layer in addition to said first intermediate layer and said second intermediate layer, and
said third intermediate layer is bonded to said metal member.

10 . The composite body as set forth in claim 9 , wherein
the mass concentration of Cu in said third intermediate layer is higher than the mass concentration of Cu in said second intermediate layer, and the mass concentration of M2 in said third intermediate layer is lower than the mass concentration of M2 in said second intermediate layer.

11 . The composite body as set forth in claim 9 , wherein said second intermediate layer is bonded to said first intermediate layer and said third intermediate layer.

12 . The composite body as set forth in claim 1 , wherein said cermet oxide phase included in said cermet member at least includes an oxide of Ni.

13 . The composite body as set forth in claim 1 , wherein at least part of said cermet oxide phase included in said cermet phase is made of nickel ferrite.

14 . The composite body as set forth in claim 1 , wherein said intermediate layer includes an intermediate oxide phase and an intermediate metal phase, and
said intermediate oxide phase includes at least one oxide of metal.

15 . The composite body as set forth in claim 14 , wherein said at least one oxide of metal is selected from the oxide of metal included in the cermet oxide phase.

16 . The composite body as set forth in claim 14 , wherein at a cross section face where said composite body is cut perpendicularly to the boundary between said cermet member and said intermediate member, in case a total of an area occupied by said intermediate oxide phase and an area occupied by said intermediate metal phase at an area where said intermediate oxide phase exist is 100%, then an area ratio occupied by said intermediate oxide phase is 10% to 50%.

17 . The composite body as set forth in claim 14 , wherein 30% or less of area is occupied by a void with respect to entire said intermediate layer.

18 . The composite body as set forth in claim 1 , in case an area of said cermet oxide phase at the cross section of said cermet member is S o , an area of said cermet metal phase is S m , and an area ratio between said cermet oxide phase and said cermet metal phase is S o /S m , then S o /S m satisfies the following equation 4.
60/40≤S o /S m ≤90/10:  (Equation 4)

19 . The composite body as set forth in claim 1 , wherein said cermet oxide phase comprises
a spinel ferrite phase expressed by a compositional formula of Ni x Fe y M z O 4 (x+y+z=3, x≠0, y≠0, M is at least one selected from the group consisting of Al, Co, Cr, Mn, Ti, Zr, Sn, V, Nb, Ta, and Hf), and a nickel oxide phase expressed by a compositional formula of Ni x′ Fe 1-x′ O (x′≠0), wherein in case entire said cermet member including said cermet oxide phase and said cermet metal phase is 100 mass %, a content ratio of said spinel phase is 40 to 80 mass %, a content ratio of said nickel oxide phase is 0 to 10 mass % (including 0 mass %), and a content ratio of said cermet metal phase is 15 to 45 mass %.

20 . The composite body as set forth in claim 19 , wherein an average composition of said spinel ferrite phase included in said cermet member is expressed by a compositional formula of Ni x1 Fe y1 M z1 O 4 (0.60≤x1≤0.90, 1.90≤y1≤2.40, 0.00≤z1≤0.20).

21 . The composite body as set forth in claim 19 , wherein said nickel oxide phase is included in said cermet member, and an average composition of said nickel oxide phase is expressed by a compositional formula of Ni x′1 Fe 1-x′1 O (0.70≤x′1≤1.00).

Assignees

• Tdk Corp

Inventors

• Nakazawa Ryoma
• Yoshidome Kazuhiro

Classifications

• B32B2250/03

  3 layers · CPC title

• B32B2307/714

  Inert, i.e. inert to chemical degradation, corrosion · CPC title

• B32B2260/046

  Synthetic resin · CPC title

• B32B2307/732

  Dimensional properties · CPC title

• B32B5/16

  characterised by features of a layer formed of particles, e.g. chips, powder {or granules (layer formed of natural mineral particles B32B19/00; layer being formed of wood fibres, chips or particles B32B21/02)} · CPC title