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Effect of Si and Ti Coating on Interface Bonding between Diamond and Fe-Based Metal Bond

机译：Si和Ti涂层对金刚石和Fe基金属键之间的界面粘合的影响

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Fe-based metal bond has been widely used in fabricating diamond tools recently since the production cost could be greatly reduced for the low price of iron. However, graphitizing elements such as Fe, Co and Ni in the matrix catalyze the transformation of diamond to graphite during high temperature sintering process, which significantly decreases the tool's efficiency and lifetime. In this paper, Si and Ti coating were coated on diamond grits by quasi atomic layer deposition (QALD) and vacuum slow vapor deposition (VSVD) separately not only to protect diamond from erosion but also to promote the adhesion between diamond grits and the bond. Three-point bending experiment was taken to measure the bending strength of Fe-Cu-Sn-Ni based metal bond diamond blade. In comparison with uncoated diamond blade, the bending strength of coated diamond blade improves dramatically. The theoretic calculation shows that the interface bonding strength between diamond and the metal bond increases by 181.68MPa owing to the Si coating. The effect of Si and Ti coating on interface bonding between diamond and the bond under different sintering temperatures was also illuminated.
机译：由于铁的低价格，最近，Fe基金金属键已广泛用于制造金刚石工具，因为铁的低价格可能会大大降低。然而，基质中的Fe，Co和Ni等石墨化元件在高温烧结过程中催化金刚石对石墨的转化，这显着降低了工具的效率和寿命。在本文中，通过准原子层沉积（QALD）涂覆在金刚石粒上的Si和Ti涂层，并分开真空慢气相沉积（VSVD），不仅可以保护钻石免受腐蚀，还可以促进金刚石砂粒和键之间的粘合。采用三点弯曲实验测量Fe-Cu-Sn-Ni金属粘合金刚石叶片的弯曲强度。与未涂覆的金刚石刀片相比，涂覆的金刚石叶片的弯曲强度急剧改善。理论计算显示，由于Si涂层，金刚石与金属键之间的界面粘合强度增加了181.68MPa。还照亮了Si和Ti涂层对金刚石和不同烧结温度下的粘合之间的界面粘合的影响。

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