摘要纳米金刚石的应用领域广泛且合成手段多样，广受国内外学者关注并进行了大量技术突破。其中爆轰法合成的纳米金刚石粒径较小，常常为亚微米级，应用范围受限。为进一步拓展金刚石的应用领域，开展微米级别金刚石颗粒的研究制造具有重要的实际意义。本文首先对人造金刚石和爆炸烧结工艺在国内外的发展概况进行总结归纳并对爆炸烧结方法和烧结机制的理论知识进行了系统研究。 在爆炸烧结理论的基础上，采用平面飞板法作为实验手段，系统开展了金刚石长大关键技术的研究。实验结果表明：90%的粉状铵锑炸药和10%的木粉混合物是合适的驱动药剂配方；飞板的厚度对金刚石的影响不大，当飞板与基板成30°时，效果最佳。对产物进行了粒径、XRD、SEM等分析，得到的大颗粒金刚石的中位径为6。18μm，为立方晶形。通过数据总结和影响因素分析后发现，炸药的使用量是合成大颗粒金刚石的关键因素。73338

毕业论文关键词  金刚石  爆炸烧结  平面飞板法   粒径

毕业设计说明书外文摘要

Title  Experimental study on Synthesis of large granular diamond by explosion method                       

Abstract Nano diamond is widely used and has variety of synthetic methods, widely attention by scholars at home and abroad。 The particle size of nano diamond synthesized by detonation method is small, which is usually sub-micron, and the application range is limited。 In order to further expand the application field of diamond, the research and manufacture of micron grade diamond particles is of great practical significance。 In this paper, the development of artificial diamond and explosive sintering process at home and abroad is summarized and the theoretical knowledge of explosive sintering and sintering mechanism is systematically studied。 Based on the theory of explosive sintering, the key technology of diamond growth is studied by using the plane flying plate method as the experimental method。 The experimental results show that: 90% of powdery Ammonium antimony explosive and 10% wood powder mixture is suitable for the driving agent formula。 The thickness of the fly plate has little effect on diamond。 When the fly plate and the substrate are 30 degrees, the effect is the best。 On the product particle size distribution, XRD, SEM analysis, the large diamond particles is cubic crystal with a median diameter of 6。18 micron。 Through the data summary and analysis of influencing factors, it is found that the amount of explosive used is the key factor to the synthesis of large diamond。

Keywords  Diamond  Explosive sintering  Plane flying plate method  Particle size

目   次

1 绪论  1

1。1 引言  1

1。2 合成金刚石的手段  2

1。2。1石墨高压相变法合成金刚石  2

1。2。2化学气相沉积法合成金刚石  2

1。2。3爆轰法合成金刚石  3

1。3 爆炸烧结工艺及其发展情况  4

1。4 本实验的研究意义和主要工作  5

1。4。1 研究意义  5

1。4。2主要工作  5

2粉末颗粒的爆炸烧结方法与烧结机制  7

2。1 常用粉末爆炸烧结方法  7

2。1。1 平面飞板法  7

2。1。2 接触爆炸法  7

2。1。3环状飞片柱面收缩法  8

2。2 粉末爆炸烧结机制  8

2。2。1粉末颗粒表面熔化结合机制  8

2。2。2粉末颗粒的碰撞焊接结合机制  8

2。2。3爆炸烧结机制与粉末粒径的关系  8

3 实验方法及步骤  10