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金刚石以其无与伦比的高硬度广泛应用于制造各种工具,但对合金与金刚石界面微观结构的研究还不多。本文从低Ti含量Sn—Ti合金入手,用真空沉积的方法,将不同含Ti量的合金分别沉积在金刚石(100)与(111)面上,经不同温度真空热处理后,利用SEM及其试样倾斜装置,将观察面分别置于0°和90°,观察合金薄膜在金刚石表面的展开形貌及进行浸润角的测量,配合X射线能谱微区成分分析以及利用JEM—200cx透射电镜倾斜台使电子束从金刚石表面掠射过去,从而实现对具有一定厚度的金刚石试样进行电子衍射结构分析。我们对膜厚及蒸膜速度的影响也进行了初步的探索。实验结果表明:1wt%Ti—Sn合金膜在一定温度下形成Ti_6Sn_5。在较低温度下它对合金膜的聚结起一定的钉扎作用。如图1、2所示、随着温度升高,在热应力的作用下,合金膜脱钉而聚结球化,对金刚石完全不浸润。表1给出不同温度热处理后浸润角的数据。
Diamond is widely used in the manufacture of various tools for its unrivaled high hardness, but there is not much research on the microstructure of the interface between alloy and diamond. In this paper, starting from low Ti content Sn-Ti alloy, using vacuum deposition method, different Ti content of the alloy were deposited on the diamond (100) and (111) surface, after different temperature vacuum heat treatment, the use of SEM and its test Like tilting device, the observation surface were placed at 0 ° and 90 °, the observed morphology of the alloy thin film on the diamond surface and the infiltration angle measurement, with the X-ray energy spectrum micro-composition analysis and the use of JEM-200cx transmission electron microscope tilt Taiwan electron beam from the diamond glancing past, in order to achieve a certain thickness of the diamond sample electron diffraction structure analysis. We also conducted a preliminary exploration of the effects of film thickness and film speed. The experimental results show that 1wt% Ti-Sn alloy film forms Ti_6Sn_5 at a certain temperature. It has a pinning effect on the coalescence of the alloy film at lower temperatures. As shown in Figure 1,2, as the temperature increases, under the action of thermal stress, the alloy film off the nail coalescence of the ball, the diamond is not infiltration. Table 1 gives the data of the infiltration angle after heat treatment at different temperatures.