EP2908877A1 - Céramique et son procédé de fabrication - Google Patents

Céramique et son procédé de fabrication

Info

Publication number
EP2908877A1
EP2908877A1 EP13776500.4A EP13776500A EP2908877A1 EP 2908877 A1 EP2908877 A1 EP 2908877A1 EP 13776500 A EP13776500 A EP 13776500A EP 2908877 A1 EP2908877 A1 EP 2908877A1
Authority
EP
European Patent Office
Prior art keywords
ceramic
ceramic body
reinforcing elements
body according
fibers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13776500.4A
Other languages
German (de)
English (en)
Inventor
Heinrich Wecker
Uwe Kemmer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ceramtec GmbH
Original Assignee
Ceramtec GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ceramtec GmbH filed Critical Ceramtec GmbH
Publication of EP2908877A1 publication Critical patent/EP2908877A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/71—Ceramic products containing macroscopic reinforcing agents
    • C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
    • C04B35/80—Fibres, filaments, whiskers, platelets, or the like
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/40—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material
    • A61L27/42—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material having an inorganic matrix
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/71—Ceramic products containing macroscopic reinforcing agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2430/00—Materials or treatment for tissue regeneration
    • A61L2430/24—Materials or treatment for tissue regeneration for joint reconstruction

Definitions

  • the invention relates to a ceramic and a method for its production.
  • the invention relates to a ceramic composite material having a graded increase of reinforcing elements in at least one direction.
  • Ceramics without reinforcing elements and ceramics with reinforcing elements are known from the prior art. Ceramics without reinforcing elements are used, for example, as part of implants.
  • the disadvantage here is usually that the ceramic must be combined with metallic parts, such as a ceramic pan inlay, which is used interoperatively in a metal pan, often made of titanium.
  • the metallic parts serve to anchor in the bone, where they are exposed to dynamic stress.
  • ceramic materials may be exposed to punctual stresses in direct contact with the metal. Dynamic loads, especially with point load of the ceramic, but can lead to the breakage of the ceramic.
  • ceramics have very great advantages, especially in joints due to their tribological properties. They can be polished very smoothly, so that only small friction moments occur in ceramic-ceramic combinations. In addition, ceramics can be very hard so that only little wear occurs. In addition, the abrasion of bio-inert ceramics is not toxic in contrast to metal abrasion.
  • the object of the invention is therefore to provide a ceramic body having a higher tolerance to punctiform stresses and to provide a manufacturing method with which such a ceramic body can be produced.
  • a ceramic body according to the invention comprises a ceramic matrix and reinforcing elements embedded in the ceramic matrix, the ceramic body having a graded texture at least in one direction.
  • the term "in one direction” includes in particular the embodiment that the gradation extends in the direction of at least one surface of the ceramic body.
  • the graded texture can be formed according to different embodiments of the invention by the amount of reinforcing elements, the size of the reinforcing elements and / or the type of reinforcing elements.
  • ceramic elements such as fibers, whiskers or platelets can be used as reinforcing elements.
  • ceramic short fibers in particular coated short ceramic fibers, as reinforcing elements.
  • graded composite materials leads to a continuous variation of all important characteristics, such.
  • gradients allow the optimum adaptation of a property profile in materials to external requirements.
  • graded components may also have functional properties that can not be achieved by direct material transfer.
  • oxide ceramic materials can be used.
  • Oxide ceramics are distinguished in comparison to metallic materials or plastics in particular by high thermal and chemical stability.
  • a quasi-ductile deformation behavior can be achieved by the incorporation of high-strength ceramic fibers.
  • Decisive influence on a quasi-ductile, damage-tolerant deformation behavior has the fiber / matrix bond, whereby mechanisms such as crack diversion, crack branching can take effect.
  • the bond between fibers and matrix can be adjusted by the properties of the ceramic matrix itself and / or suitable fiber coatings targeted.
  • the matrix is relatively porous and dense, the coupling to the fibers is low. Damage and cracks are then passed through the matrix and deflected by the fibers. If, for example, the matrix is very dense and thus the coupling to the fibers is high, cracks can also run through the fibers. Depending on the fiber coating, it is possible to set whether the fibers will detach from the matrix ("pull out") or remain in the matrix in the event of a failure, thus providing the opportunity to optimally adapt and adjust the failure behavior to the intended application.
  • the amount of reinforcing elements may increase towards at least one surface of the ceramic body.
  • the contact area between ceramic and metal can be adapted to the requirements by the reinforcing elements, particularly preferably by ceramic fibers.
  • Ceramic fibers can change the modulus of elasticity of the ceramic.
  • An altered modulus of elasticity in the contact area between ceramic and metal advantageously improves the bending strength of the ceramic and thus its resistance to dynamic loads.
  • the concomitant decreasing hardness of the material can be limited to the contact area to the metal, so that the good, in particular tribological, properties in relation to the joint surfaces are still preserved.
  • a preferred embodiment of the invention provides a ceramic body in which at least one surface is non-positively connected to a metallic component or can be connected, and wherein in the ceramic body, the reinforcing elements continuously increase in the direction of the surface with the frictional connection. So there is a graded texture, wherein the amount and / or the size and / or the type of reinforcing elements in the direction of the surface increases with the frictional connection.
  • the ceramic body may have a core which is substantially free of reinforcing elements, while the quantity of reinforcing elements increases towards the surface or surfaces of the ceramic body.
  • a ceramic body according to the invention can be produced by various methods of ceramic shaping. These are in principle all known in the art, common methods, however, still need to be adapted to the ceramic body according to the invention.
  • a ceramic body according to the invention can be produced, for example, by means of ceramic injection molding (CIM), with which an approximate shaping of the ceramic body can take place.
  • CIM ceramic injection molding
  • the short fibers can be injected into the mold in a single or multi-stage process.
  • Another production method is based on a casting technique, in which the fibers can be introduced, for example, directed by mechanical aids in a Giessschiicker.
  • Another production method is based on an infiltration technique in which, for example, prefabricated nonwovens (short fibers), scrims or fabrics (long fibers) are impregnated with ceramic slip. Special embodiments of this are, for example, freeze casting or gel casting.
  • the thermal processes for debinding and sintering of the ceramic bodies according to the invention which follow the shaping in the green state also present a great challenge, in particular because they also have a significant influence on the matrix-fiber coupling and the structure of the ceramic composite material. But here too techniques are used which are known in principle to the person skilled in the art.
  • the hard or finishing of the ceramic body is also based on known techniques, in which case the specific properties of the ceramic composite is taken into account.
  • the ceramic bodies described above can be used, for example, in medical technology, in particular as parts of an exoprosthesis, endoprosthesis, such as a knee, hip, shoulder or spinal implant, trauma nail, bone screw or trauma plate. In principle, they can be used for implants of all kinds (short-term, long-term, biocompatible, invasive, etc.) and for instruments or instrument parts, especially in medical technology.
  • such a ceramic body can be used as a component of a tool, in particular as a component of a medical tool.
  • a ceramic body of the type described can also be used wherever a quasi-ductile deformation behavior with fracture toughness> 15 MPaVm, as they are also common with metals (CoCr), is required.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Epidemiology (AREA)
  • Dermatology (AREA)
  • Composite Materials (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Cardiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Prostheses (AREA)
  • Materials For Medical Uses (AREA)

Abstract

L'invention concerne une céramique et un procédé pour la fabriquer. En particulier, l'invention concerne un composite de céramique qui présente une augmentation graduelle d'éléments de renfort dans au moins une direction.
EP13776500.4A 2012-10-16 2013-10-15 Céramique et son procédé de fabrication Withdrawn EP2908877A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102012218796 2012-10-16
DE102012219492 2012-10-25
PCT/EP2013/071458 WO2014060374A1 (fr) 2012-10-16 2013-10-15 Céramique et son procédé de fabrication

Publications (1)

Publication Number Publication Date
EP2908877A1 true EP2908877A1 (fr) 2015-08-26

Family

ID=49354679

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13776500.4A Withdrawn EP2908877A1 (fr) 2012-10-16 2013-10-15 Céramique et son procédé de fabrication

Country Status (4)

Country Link
US (1) US20150266781A1 (fr)
EP (1) EP2908877A1 (fr)
DE (1) DE102013220752A1 (fr)
WO (1) WO2014060374A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010054678A1 (fr) * 2008-11-15 2010-05-20 Diehl Metall Stiftung & Co. Kg Moule de formage
CN104987124A (zh) * 2015-07-22 2015-10-21 南京理工宇龙新材料科技有限公司 一种立方相氧化锆纤维增强的氧化锆泡沫陶瓷及其制备方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE414399B (sv) * 1976-03-16 1980-07-28 Hans Scheicher Keramiskt material for anvendning inom medicinen, i synnerhet for framstellning av implantat, fremst odontologiska implantat samt sett for framstellning av materialet
JPS6342807A (ja) * 1986-08-11 1988-02-24 トヨタ自動車株式会社 繊維強化セラミツクス製部品の製造方法
JPH06157152A (ja) * 1992-11-16 1994-06-03 Toshiba Corp 繊維強化複合傾斜材料およびその製造方法
US5522904A (en) * 1993-10-13 1996-06-04 Hercules Incorporated Composite femoral implant having increased neck strength
NL1004867C2 (nl) * 1996-12-20 1998-06-23 Tno Met vezels versterkt bio-keramisch composietmateriaal.
DE19823737C2 (de) * 1998-05-27 2003-05-15 Sepitec Foundation Vaduz Verbundwerkstoff aus Polymer- oder Keramikmaterialien
US7279230B1 (en) * 2004-02-23 2007-10-09 United States Of America As Represented By The Secretary Of The Air Force Hybrid composite materials
KR100859506B1 (ko) * 2005-07-22 2008-09-22 한국과학기술연구원 프롤린 수산화반응에 의한 ｈｉｆ―1 펩타이드와 ｖｂｃ단백질과의 상호작용을 형광편광도를 이용하여 정량적으로분석하는 방법
FI124017B (fi) * 2006-06-30 2014-01-31 Stick Tech Oy Kovettavat kuitulujitetut komposiitit ja menetelmä aplikaatio-orientuneiden kuitulujitettujen komposiittien valmistamiseksi
US9956067B2 (en) * 2007-07-06 2018-05-01 Claude Tihon Partial cuff

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010054678A1 (fr) * 2008-11-15 2010-05-20 Diehl Metall Stiftung & Co. Kg Moule de formage
CN104987124A (zh) * 2015-07-22 2015-10-21 南京理工宇龙新材料科技有限公司 一种立方相氧化锆纤维增强的氧化锆泡沫陶瓷及其制备方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 201610, Derwent World Patents Index; AN 2015-70530X *
See also references of WO2014060374A1 *

Also Published As

Publication number Publication date
WO2014060374A1 (fr) 2014-04-24
US20150266781A1 (en) 2015-09-24
DE102013220752A1 (de) 2014-04-17

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