天然金刚石形成透明硼皮金刚石的研究

RESEARCH OF TRANSPARENT BORON-SKIN DIAMOND FORMED WITH NATURAL DIAMOND

本文采用离子注入法,对天然金刚石表面进行少量渗硼,形成透明硼皮金刚石。经NP一1型X光电子能谱仪(XPS)表面测试,证明注入硼后的金刚石表面硼原子和碳原子形成了结合键。又经热失重分析(TGA)表明,用B_2O_3和硼作离子源进行注入,均能使金刚石的抗氧化温度得到提高,但用硼注入得到的“硼皮”金刚石抗氧化性更好些。用四种不同能量进行注硼时.都能使金刚石的抗氧化性得到几乎相同程度的提高,与注入的深度无关。

This paper presents a little boron permeated on the surface of natural diamond to form boron skin with the ion implantation method. Tests are done to find whether its heat resistance might be Improved.A low-energy ion-implantation device has been designed and improved. Two sources (B2O3 and pure Boron) have been implanted to the natural diamond with four energies (8.0keV. 6.5keV. 4.5keV and 2.5keV). Boron-skin forms on the surface of diamond.The surface of diamond remains to be colourless and transparent after implantation. On the surface of the natural diamond the B15 peak can't be found by XPS test. It is assumed that no boron atoms exist on the diamond surface. But after ion implanting, obvious B15 peak is found on the surface of natural diamond, then its surface structure is analysed with the surface testing. Tests show that boron atoms and carbon atoms on diamond surface form a boron-carbon structure. After TGA tests, the heat resistance has been improved in almost the same degree when four kinds of energy are used. But it is better when pure B is used than B2O3. It also shows that heat resistance of boron-skin diamond is only dependent upon the B atoms on the surface and is not upon the B atoms below the surface.