KR940014252A - Method for producing tetragonal zirconia polycrystalline sintered body with excellent fracture toughness - Google Patents

Method for producing tetragonal zirconia polycrystalline sintered body with excellent fracture toughness Download PDF

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Publication number
KR940014252A
KR940014252A KR1019920025731A KR920025731A KR940014252A KR 940014252 A KR940014252 A KR 940014252A KR 1019920025731 A KR1019920025731 A KR 1019920025731A KR 920025731 A KR920025731 A KR 920025731A KR 940014252 A KR940014252 A KR 940014252A
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KR
South Korea
Prior art keywords
tetragonal zirconia
sintered body
polycrystalline sintered
fracture toughness
powder
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Application number
KR1019920025731A
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Korean (ko)
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KR950008606B1 (en
Inventor
홍기곤
한동빈
Original Assignee
박득표
포항종합제철주식회사
백덕현
재단법인산업과학기술연구소
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Priority to KR1019920025731A priority Critical patent/KR950008606B1/en
Publication of KR940014252A publication Critical patent/KR940014252A/en
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Publication of KR950008606B1 publication Critical patent/KR950008606B1/en

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    • 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
    • C04B35/48—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 zirconium or hafnium oxides, zirconates, zircon or hafnates

Abstract

본 발명은 내마모부재 및 절삭공구용 칩등에 사용되는 세라믹스 제조방법에 관한 것으로서, 금속분말을 정방정 지르코니아 다결정 소결체내에 이차상으로 분산시켜 균열이 금속입자를 가로질러 전파되도록 유도하고 동시에 금속의 소성변형을 이용하므로서 파괴인성이 우수한 정방정 지르코니아 다결정 소결체를 제공하고자 하는데, 그 목적이 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing ceramics used in wear-resistant members, chips for cutting tools, etc., wherein metal powders are dispersed in a tetragonal zirconia polycrystalline sintered body to induce cracks to propagate across metal particles and simultaneously fire the metal. An object of the present invention is to provide a tetragonal zirconia polycrystalline sintered body having excellent fracture toughness by using deformation.

본 발명은 정방정 지르코니아 다결정 소결체를 제조하는 방법에 있어서, 정방정 지르코니아 분말에 평균입자 크기가 1.0㎛ 이하인 Mo, Co, Ni, Nb, Ta, Ti, V 및 W 금속분말로 이루어진 그룹중에서 선택된 1종 또는 2종이상의 금속분말을 5-30Vov% 첨가한 혼합분말을 통상의 방법으로 성형한 다음, 상기 성형체를 불활성 분위기 또는 환원성 분위기하 1300-1450℃의 온도에서 0.5-1.5시간동안 소성하여 파괴인성이 우수한 정방정 지르코니아 다결정 소결체를 제조하는 방법을 그 요지로 한다.The present invention provides a method for producing a tetragonal zirconia polycrystalline sintered body, wherein the tetragonal zirconia powder is selected from the group consisting of Mo, Co, Ni, Nb, Ta, Ti, V and W metal powder having an average particle size of 1.0 μm or less. Fracture toughness is formed by molding a powder containing 5-30 Vov% of species or two or more metal powders in a conventional manner, and then calcining the molded body at a temperature of 1300-1450 ° C. under an inert atmosphere or a reducing atmosphere for 0.5-1.5 hours. The method of manufacturing this excellent tetragonal zirconia polycrystal sintered compact is made into the summary.

Description

파괴인성이 우수한 정방정 지르코니아 다결정 소결체의 제조방법Method for producing tetragonal zirconia polycrystalline sintered body with excellent fracture toughness

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제 1 도는 본 발명 및 비교법에 따라 제조된 정방정 지르코니아 다결정 소결체의 미세구조를 나타내는 광학현미경사진.1 is an optical micrograph showing the microstructure of a tetragonal zirconia polycrystalline sintered body prepared according to the present invention and a comparative method.

Claims (2)

정방정 지르코니아 다결정 소결체를 제조하는 방법에 있어서, 정방정 지르코니아 분말에 평균입자 크기가 1.0㎛ 이하인 Mo, Co, Ni, Nb, Ta, Ti, V 및 W 금속분말로 이루어진 그룹중에서 선택된 1종 또는 2종이상의 금속분말을 5-30Vov% 첨가한 혼합분말을 통상의 방법으로 성형한 다음, 상기 성형체를 불활성 분위기 또는 환원성 분위기하 1300-1450℃의 온도에서 0.5-1.5시간동안 소성하여 파괴인성이 우수한 정방정 지르코니아 다결정 소결체의 제조방법.In the method for producing a tetragonal zirconia polycrystalline sintered body, at least one selected from the group consisting of Mo, Co, Ni, Nb, Ta, Ti, V and W metal powder having an average particle size of 1.0 μm or less in tetragonal zirconia powder A mixed powder containing 5-30 Vov% of paper metal powder is molded by a conventional method, and then the molded body is calcined at a temperature of 1300-1450 ° C. under an inert atmosphere or a reducing atmosphere for 0.5-1.5 hours to obtain excellent fracture toughness. Method for producing a zirconia polycrystalline sintered body. 제 1 항에 있어서, 정방정 지르코니아 분말의 입자크기가 0.5-1.0㎛이고, 그 구형도가 0.7-1.0인것을 특징으로 하는 파괴인성이 우수한 정방정 지르코니아 다결정 소결체의 제조방법.The method for producing a tetragonal zirconia polycrystalline sintered compact having excellent fracture toughness according to claim 1, wherein the particle size of the tetragonal zirconia powder is 0.5-1.0 탆 and the sphericity is 0.7-1.0. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920025731A 1992-12-28 1992-12-28 Process for the production sintering of tetragonal zirconia KR950008606B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920025731A KR950008606B1 (en) 1992-12-28 1992-12-28 Process for the production sintering of tetragonal zirconia

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920025731A KR950008606B1 (en) 1992-12-28 1992-12-28 Process for the production sintering of tetragonal zirconia

Publications (2)

Publication Number Publication Date
KR940014252A true KR940014252A (en) 1994-07-18
KR950008606B1 KR950008606B1 (en) 1995-08-03

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Application Number Title Priority Date Filing Date
KR1019920025731A KR950008606B1 (en) 1992-12-28 1992-12-28 Process for the production sintering of tetragonal zirconia

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KR950008606B1 (en) 1995-08-03

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