EP0039352A1 - Compositions de ceramique - Google Patents

Compositions de ceramique

Info

Publication number
EP0039352A1
EP0039352A1 EP19800902021 EP80902021A EP0039352A1 EP 0039352 A1 EP0039352 A1 EP 0039352A1 EP 19800902021 EP19800902021 EP 19800902021 EP 80902021 A EP80902021 A EP 80902021A EP 0039352 A1 EP0039352 A1 EP 0039352A1
Authority
EP
European Patent Office
Prior art keywords
weight percent
ceramic composition
alumina
compositions
transverse rupture
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Withdrawn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
EP19800902021
Other languages
German (de)
English (en)
Inventor
Sang H. Lee
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of EP0039352A1 publication Critical patent/EP0039352A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
    • C22C29/12—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on oxides
    • 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

Definitions

  • the present invention relates to ceramic compositions with superior mechanical properties of wear resistance and transverse rupture strength.
  • the ceramic compositions of the present invention comprise aluminum oxide and titanium carbonitride with or without metal phases.
  • oxides will, in general, exhibit higher wear resistance than the corresponding carbides or pure metals probably due to their chemical stability resulting from their more negative standard free energy of formation. This is especially evident when the materials are used in wear applications such as in metal cutting in which relatively high interface temperatures are generated thereby making diffusion of atoms across the interface a rate-controlling step for the wear process.
  • the overall wear resistance ranking of ceramic materials in metal cutting is, in general, in the order of oxides, nitrides, and finally, carbides with their correspondingly lower negative free energy of formation. Yates, U.S.
  • Patent 3,409,419 which is directed to ceramic compositions consisting of essential nitrides bonded with iron, cobalt, or nickel and wherein up to fifty percent of the essential nitride can be substituted with a carbide provided that the carbide cannot reduce the nitride content below 20 volume percent is another attempt to provide wear resistant compounds with exceptional properties.
  • the present invention provides ceramic compositions having improved toughness properties without materially affecting the inherent wear resistance characteristics thereof. This is achieved by adding an intermediate nitride phase to the alumina-titanium carbide compositions. It was found that in so doing, the titanium carbide and titanium nitride form a solid solution in the hot forming step thereby resulting in an alumina-titanium carbonitride composition of increased strength and wear resistance.
  • the ceramic compositions of the present invention comprise 10-90 weight percent alumina and 90-10 weight percent titanium carbonitride, viz.
  • c is titanium carbide and n is titanium nitride and wherein said carbonitride includes 0-30 weight percent of a metal phase comprised of Group IVB or Iron group elements including Mo or combinations thereof.
  • Articles made of such compositions are especially effective in applications where both wear resistance and toughness are required such as in metal cutting operations.
  • compositions of the present invention have average transverse rupture strengths above such alumina-TiC compositions and also possess generally improved wear resistance properties.
  • Example 1 A 700 gram mixture of alumina having an average particle size of 0.65 micron, titanium carbide powder having an average particle size of 3-5 micron, titanium nitride powders having an average particle size of 1 micron, and molybdenum powders having an average particle size of 1 micron, in a weight ratio of 10 percent, 41 percent, 40 percent, 4.5 percent and 4.5 percent, respectively, was ball milled in Soltrol for 40 hours. The milled powder mixture was vacuum dried at 240°C for 14 hours and subsequently hot pressed at 1550°C for 7 minutes under a presure of 280 kg/cm 2 .
  • the resulting hot pressed parts had a density of 5.31 g/cc and a Rockwell A (R A ) hardness of 94.
  • Cutting tool inserts having a geometry of 12.7 mm x 12.7 mm x 4.75 mm have been fabricated from hot pressed blanks. These tools have been used, in machining tests, to turn 4142 alloy steel tube of Rockwell hardness of R Q 52-58.
  • the results, given in Table 1, represent the surface speed of the work material at which the tool broke in this machining test where the surface speed was increased at an increment of 25.4 surface cm per minute (scps), two minutes at each increment starting from 50.8 scps.
  • Example 16 is directed to a conventional composition of alumina-TiC for comparison with the compositions of the present invention, alumina-titanium carbonitride composition where the titanium nitride is the major phase, i.e.,
  • Example 17 should be compared with Examples 1 and 2 where only the ratios of titanium carbide and titanium nitride have been changed leaving the alumina and metal phase constant. One can see similar differences by comparing Example 18 to Example 6 and also comparing Example 19 to Example 12.
  • compositions of the present invention are significantly tougher than pure alumina materials and are generally superior to the alumina-titanium carbide composition of Example 14 in either machining tests and/or transverse rupture strength, Furthermore, it can be seen that having titanium carbide as the major phase of the titanium carbonitride generally gives superior results to compositions where titanium nitride is the major component.
  • Example 10 In addition to the machining tests described previously, a comparative wear machining test was conducted for the compositions of Example 10 and Example 16. In this test, SNG 432 tools were used to turn 4142 steel having a Rockwell C hardness of 57 at 101.6 surface cm per sec, 0.38 mm DOC (Depth of Cut) and a feed rate of 0.254 mm per revolution for 30 minutes. The uniform flank wear of the tools was read every two minutes. The results are given in Table 2.
  • compositions of the present invention show greater wear resistance than currently commercially available compositions.

Landscapes

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

Abstract

Preparation de compositions ceramiques ayant des proprietes mecaniques en particulier une resistance a l'usure et une resistance a la rupture transversale depassant de beaucoup celles des materiaux ceramiques conventionnels. Ces compositions comprennent de l'oxyde d'aluminium et du carbonitrure de titane avec ou sans phase metallique. Des articles fabriques avec ces compositions peuvent etre utilises de maniere efficace dans des domaines tels que le coupage de metaux et d'autres applications de resistance a l'usure.
EP19800902021 1979-10-26 1980-09-22 Compositions de ceramique Withdrawn EP0039352A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US8837779A 1979-10-26 1979-10-26
US88377 1979-10-26

Publications (1)

Publication Number Publication Date
EP0039352A1 true EP0039352A1 (fr) 1981-11-11

Family

ID=22211021

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800902021 Withdrawn EP0039352A1 (fr) 1979-10-26 1980-09-22 Compositions de ceramique

Country Status (2)

Country Link
EP (1) EP0039352A1 (fr)
WO (1) WO1981001143A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4964540A (en) * 1984-10-17 1990-10-23 Exxel Container, Inc. Pressurized fluid dispenser and method of making the same
US5188908A (en) * 1990-02-23 1993-02-23 Mitsubishi Materials Corporation Al2 O3 Based ceramics
CN102029298B (zh) * 2010-12-22 2013-03-06 济南大学 Al2O3/TiC陶瓷拉拔模具及其制造方法

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1072182B (de) * 1959-12-24 VEB Hartmetallwerk Im'meib'orn, Imirmel'born (Thur.) Verfahren zur Herstellung keramischer Verbundwerkstoffe
US3143413A (en) * 1960-06-03 1964-08-04 Siegfried G Krapf Ceramic materials and methods for their manufacture
US3705025A (en) * 1968-11-18 1972-12-05 Du Pont Cutting tool
FR1600142A (fr) * 1968-12-31 1970-07-20
US3565643A (en) * 1969-03-03 1971-02-23 Du Pont Alumina - metalline compositions bonded with aluminide and titanide intermetallics
US3580708A (en) * 1969-03-06 1971-05-25 Nippon Tungsten Method of forming cutting tool materials consisting of alumina and titanium carbide
BE759202A (fr) * 1969-11-21 1971-04-30 Du Pont Articles de joaillerie a base de nitrures
US3816158A (en) * 1972-07-11 1974-06-11 L Jacobs Bonding and forming inorganic materials
SU565488A1 (ru) * 1974-11-12 1979-05-30 Всесоюзный научно-исследовательский и проектный институт тугоплавких металлов и твердых сплавов Керамический режущий материал
US4022584A (en) * 1976-05-11 1977-05-10 Erwin Rudy Sintered cermets for tool and wear applications
NL7605917A (en) * 1976-06-02 1977-12-06 Philips Nv Sintered articles of aluminium oxide and iron, cobalt or nickel - have good electrical and thermal conductivity e.g. for semiconductors
US4217113A (en) * 1977-06-13 1980-08-12 Massachusetts Institute Of Technology Aluminum oxide-containing metal compositions and cutting tool made therefrom
JPS54134717A (en) * 1978-04-12 1979-10-19 Nippon Tungsten Cutting tool material and its manufacture
JPS6041017B2 (ja) * 1978-06-13 1985-09-13 日本特殊陶業株式会社 切削工具用セラミック焼結体とその製法
JPH0589410A (ja) * 1991-09-30 1993-04-09 Toshiba Corp フロツピーデイスク装置
JP3021915B2 (ja) * 1992-02-14 2000-03-15 三洋電機株式会社 太陽電池ツリー
JPH05237913A (ja) * 1992-02-27 1993-09-17 Mitsubishi Heavy Ind Ltd 高混練スクリュ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8101143A1 *

Also Published As

Publication number Publication date
WO1981001143A1 (fr) 1981-04-30

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19820208

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Inventor name: LEE, SANG H.