爆轰烧结氧化铝黏结型纳米聚晶金刚石微粉

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基金项目:

国家自然科学基金资助(编号：11272081,11672067)。

Alumina-bonded nano-polycrystalline diamond powder synthesized by detonation sintering

1. School of Physics and Electronic Information, Shangrao Normal University, Shangrao 334001, Jiangxi, China;
2. Jiangxi Province Key Laboratory of Polymer Preparation and Processing, Shangrao 334001, Jiangxi, China;
3. Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024, Liaoning, China

摘要: 爆轰烧结氧化铝黏结型纳米聚晶金刚石微粉，并用热重分析仪、扫描电子显微镜、透射电子显微镜、X射线衍射仪分析其热稳定性、形貌、晶体结构等。发现：聚晶粉体在空气中热稳定性良好，没有明显金刚石氧化现象；且粉体分散性较好，分散粒度在0.5～0.7 μm之间。聚晶金刚石粉体由粒径100～200 nm的大颗粒聚集而成，而大颗粒是由2～10 nm纳米金刚石颗粒经氧化铝紧密黏结而形成的聚集体。
- 爆轰烧结 /
- 氧化铝黏结型 /
- 纳米聚晶金刚石 /
- 热稳定性
Abstract: Alumina-bonded nano-polycrystalline diamond was synthesized by detonation sintering. The thermal stability, morphology and crystal structure are analyzed by thermogravimetric analyzer (TGA), scanning electron microscope (SEM) and transmission electron microscopes (TEM). Results show that the nano-polycrystalline diamond has good thermal stability in air with no obvious oxidation and good dispersity, the particle sizes of which are 0.5 to 0.7 μm. The nano-polycrystalline diamond is made up of large particles sized 100 to 200 nm, which are the aggregates formed by 2 to 10 nm alumina tightly bonded nano-diamond particles.
- detonation sintering /
- alumina-bonded /
- nano-polycrystalline diamond /
- thermal stability