SE507706C2 - Kiselkarbidwhiskerförstärkt oxidbaserat keramiskt skär - Google Patents

Kiselkarbidwhiskerförstärkt oxidbaserat keramiskt skär

Info

Publication number
SE507706C2
SE507706C2 SE9400187A SE9400187A SE507706C2 SE 507706 C2 SE507706 C2 SE 507706C2 SE 9400187 A SE9400187 A SE 9400187A SE 9400187 A SE9400187 A SE 9400187A SE 507706 C2 SE507706 C2 SE 507706C2
Authority
SE
Sweden
Prior art keywords
silicon carbide
oxide based
whiskers
based ceramic
carbide whisker
Prior art date
Application number
SE9400187A
Other languages
English (en)
Other versions
SE9400187L (sv
SE9400187D0 (sv
Inventor
Gunnar Brandt
Original Assignee
Sandvik Ab
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20392648&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=SE507706(C2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sandvik Ab filed Critical Sandvik Ab
Priority to SE9400187A priority Critical patent/SE507706C2/sv
Publication of SE9400187D0 publication Critical patent/SE9400187D0/sv
Priority to US08/246,135 priority patent/US5449647A/en
Priority to JP7519506A priority patent/JPH09508094A/ja
Priority to DE69516266T priority patent/DE69516266T2/de
Priority to PCT/SE1995/000046 priority patent/WO1995019940A1/en
Priority to EP95907184A priority patent/EP0740644B1/en
Priority to AT95907184T priority patent/ATE191708T1/de
Publication of SE9400187L publication Critical patent/SE9400187L/sv
Publication of SE507706C2 publication Critical patent/SE507706C2/sv

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
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C04B35/111—Fine ceramics
    • C04B35/117—Composites
    • C04B35/119—Composites with zirconium oxide
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Composite Materials (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Ceramic Products (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Inorganic Fibers (AREA)

Description

507 706 2 Enligt föreliggande uppfinning framställs keramiska kompo- siter genom att blanda aluminiumoxidpulver och konventionella sintringstillsatser och korntillväxthämmare med monokristallina SiC whiskers med någon lämplig blandningsteknik.
Efter torkning varmpressas eller varmisostatpressas bland- ningen till en densitet àtminstone 99 % av teoretisk densitet.
Längd/diameterförhàllandet för whiskerna pàverkas inte sá mycket av blandningstekniken och varmpressningsoperation även om det kan förväntas att àtminstone de längre whiskerna kommer att brytas varför det önskade längd/diameterförhàllandet för whiskerna maste regleras genom förmalning av whiskerna före blandningen med aluminiumoxid. Längd/diameterförhállandet för kommersiella SiC-whiskers är normalt mycket högre än 10.
Exempel 1 Aluminiumoxid-30 vol-% SiC-whiskerkompositer med olika längd av whiskerna framställdes pá följande sätt. De använda ràmaterialen är upptagna i tabell 1.
Tabell l Använt råmaterial Material Tillverkare Tillverkarens Partikelstorlek benämning (diameter), pm Al2O3 Alcoa Enl6 SG 0,5 sicw* Acmc silar sc9 O, 5 MgO Merck & Co <1 YZO3 HC StarCk 3,5 * Whiskerràmaterialet innehåller 80-90 % whiskers med res- ten i form av huvudsakligen smà, submikrona kiselkarbidpartik- lar.
Whiskerlängderna hos ràmaterialet och efter de olika mal- ningsstegen mättes efter dispersion av whiskerna vid en lag koncentration i en ammoniaklösning och efterföljande torkning pä en provhàllare. SEM-foton analyserades sedan manuellt i en Quantimet 570 bildanalysator fràn Cambridge Instrument.
Sammansättningen hölls konstant för alla varianter vid 25 vikt-% SiCw och 0,1 vikt-% MgO och YZO3 respektive. Alla 10 15 20 25 30 3 so? 706 sammansättningar var varmpressade vid 1825 OC i 100 min vid 25 MPa till skivor av diameter 80 mm.
Tabell 2 visar de förmalningstider som användes för utvär- deringen av varierande längd/diameterförhàllande pà skärpres- tanda och motsvarande whiskerlängder.
Tabell 2 Förmalningstider Variant Förmalning, Whiskerlängd Diameter h Median Medel Std dev Medel A 0 23,0 28,2 23.1 0,54 B 4 5,8 6,4 4,0 " C 18 4,2 5,9 3,8 " D 72 2,7 2,9 1,3 " De sintrade materialen karakteriserades med avseende pà densitet, hårdhet, brottseghet och brotthállfasthet. Hàrdhet och seghet mättes med användning av ett Vickersintryck med en 10 kg last. Alla mätningar utfördes pà planet vinkelrätt mot varmpressningsriktningen_ Brottsegheten beräknades enligt for- meln P Klc = 0,0824 -5; c där P = kraften i N och c = spricklängden efter intrycket.
Brotthàllfastheten mättes i tre-punkts böjande. Medelbrott- spänningen beräknades fràn 9 prov 13,3 x 3,5 x 2,0 mm, spann 9 mm, lastpàläggningshastighet 50 N/s. De uppmätta värdena kan återfinnas i tabell 3. 10 15 20 25 30 35 507 706 4 Tabell 3 Densitet, hàrdhet, brottseghet och brotthàllfasthet.
Variant Densitet Hardhet Brott- Brott- seghet hàllfasthet g/ cm3 Hv Mpamlfi MPa A 3,74 1850 4,9 1042 B 3,75 1890 4,8 1056 C 3,75 1910 4,6 1066 D 3,75 1920 3,8 846 Exemgel 2 Materialen provades i metallbearbetningsoperationer. För detta ändamàl tillverkades skär med ISO beteckning RNGN 120400 T01020 av de varmpressade skivorna.
Tvà slag av svarvningsprov utfördes; ett DOC(Depth of Cut) notchmotstàndsprov och ett seghetsprov.
DOC notchmotstàndsprovet genomfördes vid vatsvarvning pà en cylindrisk stäng Inconel 718, med användning av följande data: Matning = 0,15 mm/rev Skärhastighet = 250 m/min Skärdjup = 1,5 mm Seghetsprovet utfördes torrt med användning av ett arbets- stycke av stál(SS 2242)plát. Formen i kombination med en ökande matning leder till brott. Tiden till brott är ett màtt pá seg- heten hos det skärande verktygsmaterialet. Svarvdata var: Matning = 0,1 mm/varv, ökat 0,1 mm/varv varje minut Skärhastighet = Skärdjup = 1,5 mm Resultat fràn skärprovet kan återfinnas i tabell 4. 90 m/min Tabell 4 DOC notchslitstyrka och seghetsbeteende i metallbearbetning Variant DOC notchslitstyrka, Seghet, tid till brott, tid till 2 mm notch median A 15 0,51 B 17 0,65 C 11 0,46 D 6 0,26 507 706 Av provet kan det konstateras att varianten B är nàgot mer slitstark och visar ett bättre seghetsbeteende än variant A med omalda whiskers. För mycket malning reducerar bade slitstyrka och seghetsbeteende.

Claims (1)

10 507 706 Krav
1. Oxidbaserat keramiskt skär för spànformande maskinbearbetning av varmhàllfasta legeringar varvid skäret bestàr av en aluminiumoxidbaserad matris och 5-50 volym-% av homogent fördelade whiskers av kiselkarbid, k ä n n e t e c k n a t av, att sagda whiskers har en medellängd av 4-7 pm med en standardavvikelse av 3-5, företrädesvis omkring 4.
SE9400187A 1994-01-21 1994-01-21 Kiselkarbidwhiskerförstärkt oxidbaserat keramiskt skär SE507706C2 (sv)

Priority Applications (7)

Application Number Priority Date Filing Date Title
SE9400187A SE507706C2 (sv) 1994-01-21 1994-01-21 Kiselkarbidwhiskerförstärkt oxidbaserat keramiskt skär
US08/246,135 US5449647A (en) 1994-01-21 1994-05-19 Silicon carbide whisker reinforced cutting tool material
JP7519506A JPH09508094A (ja) 1994-01-21 1995-01-19 シリコンカーバイトホィスカーで強化した切削工具材
DE69516266T DE69516266T2 (de) 1994-01-21 1995-01-19 Siliciumkarbid-whisker verstärktes werkzeugmaterial
PCT/SE1995/000046 WO1995019940A1 (en) 1994-01-21 1995-01-19 Silicon carbide whisker reinforced cutting tool material
EP95907184A EP0740644B1 (en) 1994-01-21 1995-01-19 Silicon carbide whisker reinforced cutting tool material
AT95907184T ATE191708T1 (de) 1994-01-21 1995-01-19 Siliciumkarbid-whisker verstärktes werkzeugmaterial

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9400187A SE507706C2 (sv) 1994-01-21 1994-01-21 Kiselkarbidwhiskerförstärkt oxidbaserat keramiskt skär

Publications (3)

Publication Number Publication Date
SE9400187D0 SE9400187D0 (sv) 1994-01-21
SE9400187L SE9400187L (sv) 1995-07-22
SE507706C2 true SE507706C2 (sv) 1998-07-06

Family

ID=20392648

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9400187A SE507706C2 (sv) 1994-01-21 1994-01-21 Kiselkarbidwhiskerförstärkt oxidbaserat keramiskt skär

Country Status (7)

Country Link
US (1) US5449647A (sv)
EP (1) EP0740644B1 (sv)
JP (1) JPH09508094A (sv)
AT (1) ATE191708T1 (sv)
DE (1) DE69516266T2 (sv)
SE (1) SE507706C2 (sv)
WO (1) WO1995019940A1 (sv)

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SE9400187L (sv) 1995-07-22
JPH09508094A (ja) 1997-08-19
ATE191708T1 (de) 2000-04-15
EP0740644A1 (en) 1996-11-06
DE69516266T2 (de) 2001-01-25
EP0740644B1 (en) 2000-04-12
SE9400187D0 (sv) 1994-01-21
WO1995019940A1 (en) 1995-07-27
US5449647A (en) 1995-09-12
DE69516266D1 (de) 2000-05-18

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