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Preparation method of alpha/beta-SiAlON ceramic cutter material with directionally distributed beta-SiAlON crystal grains with large length-diameter ratio
The invention discloses a preparation method of an alpha/beta-SiAlON ceramic cutter material with directionally distributed beta-SiAlON crystal grains with a large length-diameter ratio, and belongs to the technical field of material preparation. Silicon nitride, aluminum nitride, aluminum oxide and rare earth oxide sintering aids ytterbium oxide and samarium oxide powder are adopted as raw materials, and the alpha/beta-SiAlON ceramic cutter material is obtained through spark plasma sintering. The alpha/beta-SiAlON ceramic material prepared by the invention can realize directional distribution of beta-SiAlON crystal grains with a large length-diameter ratio on the basis of realizing complete compactness, and has extremely high hardness and excellent fracture toughness, the Vickers hardness reaches 18.58 +/-0.35 GPa, and the fracture toughness reaches 6.33 +/-0.31 MPa.m < 1/2 >.
本发明公开了一种大长径比β‑SiAlON晶粒定向分布的α/β‑SiAlON陶瓷刀具材料制备方法，属于材料制备技术领域。本发明采用氮化硅、氮化铝、氧化铝以及稀土氧化物助烧剂氧化镱、氧化钐粉末为原料，经过放电等离子烧结得到α/β‑SiAlON陶瓷刀具材料。本发明制备的α/β‑SiAlON陶瓷材料在实现完全致密的基础上，可实现大长径比β‑SiAlON晶粒的定向分布，具有极高的硬度以及优越的断裂韧性，维氏硬度达18.58±0.35GPa，断裂韧性达6.33±0.31MPa·m1/2。
Preparation method of alpha/beta-SiAlON ceramic cutter material with directionally distributed beta-SiAlON crystal grains with large length-diameter ratio
The invention discloses a preparation method of an alpha/beta-SiAlON ceramic cutter material with directionally distributed beta-SiAlON crystal grains with a large length-diameter ratio, and belongs to the technical field of material preparation. Silicon nitride, aluminum nitride, aluminum oxide and rare earth oxide sintering aids ytterbium oxide and samarium oxide powder are adopted as raw materials, and the alpha/beta-SiAlON ceramic cutter material is obtained through spark plasma sintering. The alpha/beta-SiAlON ceramic material prepared by the invention can realize directional distribution of beta-SiAlON crystal grains with a large length-diameter ratio on the basis of realizing complete compactness, and has extremely high hardness and excellent fracture toughness, the Vickers hardness reaches 18.58 +/-0.35 GPa, and the fracture toughness reaches 6.33 +/-0.31 MPa.m < 1/2 >.
本发明公开了一种大长径比β‑SiAlON晶粒定向分布的α/β‑SiAlON陶瓷刀具材料制备方法，属于材料制备技术领域。本发明采用氮化硅、氮化铝、氧化铝以及稀土氧化物助烧剂氧化镱、氧化钐粉末为原料，经过放电等离子烧结得到α/β‑SiAlON陶瓷刀具材料。本发明制备的α/β‑SiAlON陶瓷材料在实现完全致密的基础上，可实现大长径比β‑SiAlON晶粒的定向分布，具有极高的硬度以及优越的断裂韧性，维氏硬度达18.58±0.35GPa，断裂韧性达6.33±0.31MPa·m1/2。
Preparation method of alpha/beta-SiAlON ceramic cutter material with directionally distributed beta-SiAlON crystal grains with large length-diameter ratio
一种大长径比β-SiAlON晶粒定向分布的α/β-SiAlON陶瓷刀具材料制备方法
YIN ZENGBIN (author) / GUO FUZHOU (author) / YUAN JUNTANG (author)
2023-08-18
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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