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SiAlON SiAlON SiAlON composite and cutting tools made thereof
The present invention relates to a SiAlON composite material having abrasion resistance and fracture toughness which are appropriate in machining heat resistant alloys (HRSA), and cutting tools made of the SiAlON composite material. A SiAlON composite material according to an exemplary embodiment of the present invention comprises a SiAlON phase including an alpha SiAlON phase and a beta SiAlON phase, and an intergranular phase. The SiAlON composite material is prepared from a starting powder mixture comprising a silicon nitride powder and one or more powders which provide aluminum, oxygen, nitrogen, yttrium (Y) and erbium (Er) to the SiAlON composite material. The SiAlON composite material contains at least 90% by volume of the SiAlON phase. The beta SiAlON phase has a z value of 0.27 to 0.36. The SiAlON composite material has a thermal diffusivity of 2.4 (mm^2/sec) to 5.2(mm^2/sec). A SiAlON composite material according to an exemplary embodiment of the present invention has thermal conductivity and thermal diffusivity that are capable of being used in cutting tool inserts in the process of processing heat resistant alloys.
본 발명의 실시예에 따른 SiAlON 복합 재료는, 알파 SiAlON 상(phase) 및 베타 SiAlON 상을 포함하는 SiAlON 상과, 입계 상(intergranular phase)를 포함하는 SiAlON 복합 재료로서, 상기 SiAlON 복합 재료는 실리콘 나이트라이드 분말과, 알루미늄, 산소, 질소, 이트륨(Y) 및 어븀(Er)을 상기 SiAlON 복합 재료에 제공하는 1종 이상의 분말을 포함하는 출발 분말 혼합물로부터 제조되고, 상기 SiAlON 복합 재료는 적어도 90 vol% 이상의 상기 SiAlON 상을 함유하고, 상기 베타 SiAlON 상의 z 값은 0.27 내지 0.36 사이이고, 상기 SiAlON 복합 재료의 열확산도(thermal diffusivity)는 2.4(mm/sec) 이상 5.2(mm/sec) 이하일 수 있다.
SiAlON SiAlON SiAlON composite and cutting tools made thereof
The present invention relates to a SiAlON composite material having abrasion resistance and fracture toughness which are appropriate in machining heat resistant alloys (HRSA), and cutting tools made of the SiAlON composite material. A SiAlON composite material according to an exemplary embodiment of the present invention comprises a SiAlON phase including an alpha SiAlON phase and a beta SiAlON phase, and an intergranular phase. The SiAlON composite material is prepared from a starting powder mixture comprising a silicon nitride powder and one or more powders which provide aluminum, oxygen, nitrogen, yttrium (Y) and erbium (Er) to the SiAlON composite material. The SiAlON composite material contains at least 90% by volume of the SiAlON phase. The beta SiAlON phase has a z value of 0.27 to 0.36. The SiAlON composite material has a thermal diffusivity of 2.4 (mm^2/sec) to 5.2(mm^2/sec). A SiAlON composite material according to an exemplary embodiment of the present invention has thermal conductivity and thermal diffusivity that are capable of being used in cutting tool inserts in the process of processing heat resistant alloys.
본 발명의 실시예에 따른 SiAlON 복합 재료는, 알파 SiAlON 상(phase) 및 베타 SiAlON 상을 포함하는 SiAlON 상과, 입계 상(intergranular phase)를 포함하는 SiAlON 복합 재료로서, 상기 SiAlON 복합 재료는 실리콘 나이트라이드 분말과, 알루미늄, 산소, 질소, 이트륨(Y) 및 어븀(Er)을 상기 SiAlON 복합 재료에 제공하는 1종 이상의 분말을 포함하는 출발 분말 혼합물로부터 제조되고, 상기 SiAlON 복합 재료는 적어도 90 vol% 이상의 상기 SiAlON 상을 함유하고, 상기 베타 SiAlON 상의 z 값은 0.27 내지 0.36 사이이고, 상기 SiAlON 복합 재료의 열확산도(thermal diffusivity)는 2.4(mm/sec) 이상 5.2(mm/sec) 이하일 수 있다.
SiAlON SiAlON SiAlON composite and cutting tools made thereof
SiAlON 복합 재료 및 이 SiAlON 복합 재료로 만들어진 절삭 공구
CHUN SUNG SU (author) / LEE DAE YEOP (author) / PARK GEUN HO (author) / HONG CHANG HOON (author)
2016-11-02
Patent
Electronic Resource
Korean
SiAlON SiAlON SiAlON composite and cutting tools made thereof
European Patent Office | 2021