JP7189824B2 - ハニカム構造体及びハニカム構造体の製造方法 - Google Patents
ハニカム構造体及びハニカム構造体の製造方法 Download PDFInfo
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- JP7189824B2 JP7189824B2 JP2019069413A JP2019069413A JP7189824B2 JP 7189824 B2 JP7189824 B2 JP 7189824B2 JP 2019069413 A JP2019069413 A JP 2019069413A JP 2019069413 A JP2019069413 A JP 2019069413A JP 7189824 B2 JP7189824 B2 JP 7189824B2
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- bonding material
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- porous honeycomb
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Description
(1)多孔質ハニカムブロック体が、接合材層Aを介して複数個結束されて構成されたハニカム構造体であって、前記多孔質ハニカムブロック体は、流体の流路となり流体の流入側の端面である流入端面から流体の流出側の端面である流出端面まで延びる複数のセルを区画形成する隔壁と、最外周に位置する外周壁とを有する多孔質ハニカムセグメントが、接合材層Bを介して複数個結束されて構成されており、前記接合材層Aの少なくとも一部が前記接合材層Bより高い靭性を有するハニカム構造体。
(2)多孔質ハニカムブロック体が、接合材層Aを介して複数個結束されて構成されたハニカム構造体であって、前記多孔質ハニカムブロック体は、流体の流路となり流体の流入側の端面である流入端面から流体の流出側の端面である流出端面まで延びる複数のセルを区画形成する隔壁と、最外周に位置する外周壁とを有する多孔質ハニカムセグメントが、接合材層Bを介して複数個結束されて構成されており、前記接合材層Aは、前記接合材層Bと同じ材料からなり、少なくとも一部が欠損した接合材層で構成されたハニカム構造体。
(3)流体の流路となり流体の流入側の端面である流入端面から流体の流出側の端面である流出端面まで延びる複数のセルを区画形成する隔壁と、最外周に位置する外周壁とを有する多孔質ハニカムセグメントを、接合材層Bを介して複数個結束して多孔質ハニカムブロック体を作製する工程と、前記多孔質ハニカムブロック体を、接合材層Aを介して複数個結束してハニカム構造体を作製する工程とを備え、前記接合材層Aの少なくとも一部が前記接合材層Bより高い靭性を有するハニカム構造体の製造方法。
(4)流体の流路となり流体の流入側の端面である流入端面から流体の流出側の端面である流出端面まで延びる複数のセルを区画形成する隔壁と、最外周に位置する外周壁とを有する多孔質ハニカムセグメントを、接合材層Bを介して複数個結束して多孔質ハニカムブロック体を作製する工程と、前記多孔質ハニカムブロック体を、接合材層Aを介して複数個結束してハニカム構造体を作製する工程とを備え、前記接合材層Aは、前記接合材層Bと同じ材料からなり、少なくとも一部が欠損した接合材層で構成されたハニカム構造体の製造方法。
〔ハニカム構造体114の構成〕
図2に、本発明の実施形態1に係る多孔質ハニカムブロック体112及びハニカム構造体114の外観模式図を示す。ハニカム構造体114は、多孔質ハニカムブロック体112が、接合材層A(113)を介して複数個結束されて構成されている。多孔質ハニカムブロック体112は、多孔質ハニカムセグメント110が、接合材層B(111)を介して複数個結束されて構成されている。図2では、多孔質ハニカムブロック体112を縦横に2個ずつ積層して接合することで、多孔質ハニカムブロック体112が合計4個結束されて構成された態様を示しているが、これに限られない。例えば、多孔質ハニカムブロック体112を縦横に3個以上ずつ積層して接合してもよく、また、縦横に同数ではなく、異なる数を積層して接合してもよい。このようにして、多孔質ハニカムブロック体112を用いて所望の大きさのハニカム構造体114を適宜作製することができる。
靭性=曲げ許容歪=破断時の変形量-破壊開始点の変形量 (1)
靭性の測定は、JIS R1601 2008「ファインセラミックスの室温曲げ強さ試験方法」の4点曲げ強さ試験方法に準拠して測定することができる。図11に、当該4点曲げ強さ試験方法に準拠して「靭性」を測定する様子を示す模式図を示す。図11(a)は、試験ジグに設置された、接合材層で接合された多孔質ハニカムセグメント(試験片)の上部から見た平面模式図である。図11(b)は、試験片の側面からみた平面模式図である。図11(c)は、試験ジグに設置された、試験片の端面から見た平面模式図である。
図11に示すように、試験片の形状は断面が長方形の角柱とし、セルが延びる方向を厚さ方向として試験ジグに設置している。試験片の厚さは12mmとし、全長は50mmとし、幅は16mmとする。試験片は、全長方向の中央部に接合層が配置できるように作製する。
試験片を設置する試験ジグ及び支点間距離は、JIS R1601 2008の表1-曲げ方式、試験片、試験ジグ及び支点間距離に記載の試験ジグ名:4p-40/20、曲げ方式:4点曲げ方式、外部支点間距離:40±0.1mm、内部支点間距離:20±0.1mmとする。
接合材層の靭性測定は、クロスヘッドにロードセルを取り付けて試験ジグに設置し、上記4点曲げ強さ試験の際に荷重と変位を測定し、応力歪曲線(S-Sカーブ)を求める。上記式(1)において、破断時とは、当該応力歪曲線において応力がゼロになった点を指し、破壊開始点とは応力歪曲線の降伏点を指す。
次に、本発明の実施形態1に係るハニカム構造体114の製造方法の一例を説明する。まず、図3に示すような多孔質ハニカムセグメント110を作製する。多孔質ハニカムセグメント110の製造工程としては、まず、SiC材料からなるセラミックス原料に、バインダー、分散剤(界面活性剤)、造孔材、水などを添加し、これを混合及び混錬し、坏土を調製する。ここで、SiC材料とは、SiC(炭化珪素)を主成分とする材料を意味し、例えば、再結晶SiCのようにSiCのみからなる材料や、Si-SiC系複合材料、Cordierite(コージェライト)-SiC系複合材料、金属珪素含侵SiCなどが包含される。
〔ハニカム構造体124の構成〕
図7に、本発明の実施形態2に係る多孔質ハニカムブロック体122及びハニカム構造体124の外観模式図を示す。ハニカム構造体124は、多孔質ハニカムブロック体122が、接合材層A(123)を介して複数個結束されて構成されている。多孔質ハニカムブロック体122は、多孔質ハニカムセグメント120が、接合材層B(121)を介して複数個結束されて構成されている。図7では、多孔質ハニカムブロック体122を縦横に2個ずつ積層して接合することで、多孔質ハニカムブロック体122が合計4個結束されて構成された態様を示しているが、これに限られない。例えば、多孔質ハニカムブロック体122を縦横に3個以上ずつ積層して接合してもよく、また、縦横に同数ではなく、異なる数を積層して接合してもよい。このようにして、多孔質ハニカムブロック体122を用いて所望の大きさのハニカム構造体124を適宜作製することができる。
本発明の実施形態2に係るハニカム構造体124の製造方法としては、実施形態1に係るハニカム構造体114の製造方法と同様にして行うことができる。すなわち、まず、多孔質ハニカムセグメント120を作製し、複数の多孔質ハニカムセグメント120の各々に対し、各々の被接合面間に接合材を塗布することで接合材層B(121)を介在させて接合して多孔質ハニカムブロック体122を作製する。次に、複数の多孔質ハニカムブロック体122の各々に対し、各々の被接合面間に接合材を塗布することで接合材層A(123)を介在させて接合することで、図7に示すような多孔質ハニカムブロック体122が複数個結束したハニカム構造体124を作製することができる。このとき、接合材層A(123)の少なくとも一部が接合材層Bより高い靭性を有するように形成する。本発明の実施形態2では、複数の多孔質ハニカムブロック体122を接合する接合材層A(123)について、複数の多孔質ハニカムセグメント120を接合する接合材層B(121)より靭性が高い材料で構成することにより、接合材層B(121)より高い靭性を付与している。
〔ハニカム構造体134の構成〕
図9に、本発明の実施形態3に係る多孔質ハニカムブロック体132及びハニカム構造体134の外観模式図を示す。ハニカム構造体134は、多孔質ハニカムブロック体132が、接合材層A(133)を介して複数個結束されて構成されている。多孔質ハニカムブロック体132は、多孔質ハニカムセグメント130が、接合材層B(131)を介して複数個結束されて構成されている。図9では、多孔質ハニカムブロック体132を縦横に2個ずつ積層して接合することで、多孔質ハニカムブロック体132が合計4個結束されて構成された態様を示しているが、これに限られない。例えば、多孔質ハニカムブロック体132を縦横に3個以上ずつ積層して接合してもよく、また、縦横に同数ではなく、異なる数を積層して接合してもよい。このようにして、多孔質ハニカムブロック体132を用いて所望の大きさのハニカム構造体134を適宜作製することができる。
本発明の実施形態3に係るハニカム構造体134の製造方法としては、実施形態1に係るハニカム構造体114の製造方法と同様にして行うことができる。すなわち、まず、多孔質ハニカムセグメント130を作製し、複数の多孔質ハニカムセグメント130の各々に対し、各々の被接合面間に接合材を塗布することで接合材層B(131)を介在させて接合して多孔質ハニカムブロック体132を作製する。次に、複数の多孔質ハニカムブロック体132の各々に対し、各々の被接合面間に接合材を塗布することで接合材層A(133)を介在させて接合することで、図9に示すような多孔質ハニカムブロック体132が複数個結束したハニカム構造体134を作製することができる。このとき、複数の多孔質ハニカムブロック体132を接合する接合材層A(133)について、複数の多孔質ハニカムセグメント130を接合する接合材層B(131)と同じ材料からなり、少なくとも一部が欠損した接合材層で構成する。すなわち、本発明の実施形態3では、複数の多孔質ハニカムブロック体132を接合する接合材層A(133)は、少なくとも一部に欠損部136を有している。
20 接着材層
30 受板
40、112、122、132 多孔質ハニカムブロック体
111、121、131 接合材層B
113、123、133 接合材層A
114、124、134 ハニカム構造体
115 セル
116 隔壁
117 外周壁
118 研削加工しろ
119、129、139 コート材
136 欠損部
140 回転軸
141 砥石
Claims (9)
- 多孔質ハニカムブロック体が、接合材層Aを介して複数個結束されて構成されたハニカム構造体であって、
前記多孔質ハニカムブロック体は、流体の流路となり流体の流入側の端面である流入端面から流体の流出側の端面である流出端面まで延びる複数のセルを区画形成する隔壁と、最外周に位置する外周壁とを有する多孔質ハニカムセグメントが、接合材層Bを介して複数個結束されて構成されており、
前記接合材層Aの少なくとも一部が前記接合材層Bより高い靭性を有し、
前記接合材層Bより高い靭性を有する前記接合材層Aは、前記接合材層Bと同じ材料からなり、前記接合材層Bと幅の異なる接合材層で構成されたハニカム構造体。 - 前記接合材層Bより高い靭性を有する前記接合材層Aは、前記接合材層Bを構成する材料より靭性が高い材料で構成された請求項1に記載のハニカム構造体。
- 前記接合材層Aの全部が前記接合材層Bより高い靭性を有する請求項1または2に記載のハニカム構造体。
- 多孔質ハニカムブロック体が、接合材層Aを介して複数個結束されて構成されたハニカム構造体であって、
前記多孔質ハニカムブロック体は、流体の流路となり流体の流入側の端面である流入端面から流体の流出側の端面である流出端面まで延びる複数のセルを区画形成する隔壁と、最外周に位置する外周壁とを有する多孔質ハニカムセグメントが、接合材層Bを介して複数個結束されて構成されており、
前記接合材層Aは、前記接合材層Bと同じ材料からなり、少なくとも一部が欠損した接合材層で構成されたハニカム構造体。 - 複数の前記多孔質ハニカムブロック体が、互いに同じ数の前記多孔質ハニカムセグメントを備えている請求項1~4のいずれか一項に記載のハニカム構造体。
- 前記多孔質ハニカムブロック体が縦と横に同数結束されて構成された請求項1~5のいずれか一項に記載のハニカム構造体。
- 流体の流路となり流体の流入側の端面である流入端面から流体の流出側の端面である流出端面まで延びる複数のセルを区画形成する隔壁と、最外周に位置する外周壁とを有する多孔質ハニカムセグメントを、接合材層Bを介して複数個結束して多孔質ハニカムブロック体を作製する工程と、
前記多孔質ハニカムブロック体を、接合材層Aを介して複数個結束してハニカム構造体を作製する工程と、
を備え、
前記接合材層Aの少なくとも一部が前記接合材層Bより高い靭性を有し、
前記接合材層Bより高い靭性を有する前記接合材層Aは、前記接合材層Bと同じ材料からなり、前記接合材層Bと幅の異なる接合材層で構成されたハニカム構造体の製造方法。 - 流体の流路となり流体の流入側の端面である流入端面から流体の流出側の端面である流出端面まで延びる複数のセルを区画形成する隔壁と、最外周に位置する外周壁とを有する多孔質ハニカムセグメントを、接合材層Bを介して複数個結束して多孔質ハニカムブロック体を作製する工程と、
前記多孔質ハニカムブロック体を、接合材層Aを介して複数個結束してハニカム構造体を作製する工程と、
を備え、
前記接合材層Aは、前記接合材層Bと同じ材料からなり、少なくとも一部が欠損した接合材層で構成されたハニカム構造体の製造方法。 - 前記多孔質ハニカムブロック体を作製する工程において、少なくとも前記多孔質ハニカムブロック体の外周壁を構成する多孔質ハニカムセグメントの外周壁を研削加工しろ分だけ厚く形成し、または、少なくとも前記多孔質ハニカムブロック体の外周壁を構成する多孔質ハニカムセグメントの外周壁に接合材を塗布して乾燥することで研削加工しろ分だけ厚く形成し、
前記多孔質ハニカムブロック体の外周壁を構成する多孔質ハニカムセグメントの外周壁の前記研削加工しろを研削除去した後に、
前記多孔質ハニカムブロック体を、接合材層Aを介して複数個結束してハニカム構造体を作製する工程を実施する請求項7または8に記載のハニカム構造体の製造方法。
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