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首页> 外文会议>TMS(The Minerals, Metals amp; Materials Society) Annual Meeting; 20050213-17; San Francisco, CA(US) >MATERIAL TRANSFER BETWEEN Al, Cu, Ti AND TiB_2 COATINGS: EFFECTS OF ATMOSPHERE AND SPEED
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MATERIAL TRANSFER BETWEEN Al, Cu, Ti AND TiB_2 COATINGS: EFFECTS OF ATMOSPHERE AND SPEED

机译：Al，Cu，Ti和TiB_2涂层之间的材料转移：气氛和速度的影响

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In an attempt to better understand the mechanisms of material transfer and adhesion to coated surfaces, magnetron sputtered TiB_2 coatings on M2 tool steel discs have been tested against commercially pure Al, Cu and Ti pins using an environmentally controlled vacuum pin-on-disc tribometer. A constant load of 4.9 N and three different sliding speeds of 0.015, 0.120 and 0.650 m/s were employed. Pin-on-disc tests were done in ambient air and under argon atmosphere. Material transfer to the TiB_2 surface was observed to occur in two different morphologies including the formation of a thin layer of metal covering the counterface (smearing), and material transfer in the form of larger pieces, which normally became adhered to the counterface. The minimum amount of material transfer was from the Cu pin to the TiB_2 coating surface in both argon and ambient air tests. For Al and Ti, the amount of material adhered to the coating surface was significantly greater in argon than in ambient air tests. The most severe form of adhesion occurred when the Ti pin was tested against the TiB_2 coating in the argon atmosphere. For Al, the transfer material mostly smeared on the TiB_2 surface in argon. More material was removed from the metal pins in ambient air and the transferred material became mostly oxidized loose wear debris during sliding. The relative amounts of the debris formed could be ranked with respect to the driving forces of the metals for oxidation (i.e. standard Gibbs free energy of oxide formation); it was highest for Al and lowest for Cu. Sliding speed affected both the amount and morphology of the material transferred onto the TiB_2 coating surface. For Ti, the amount of material adhered to the TiB_2 coating surface increased with sliding speed in both argon and ambient air. The adhered particles were mostly in the form of chunks of material at the high sliding speed. The observations reported here showed the importance of test atmosphere, loading conditions, and the mechanical properties of the metals on the adhesion and transfer behavior of metals on coating surfaces.
机译：为了更好地理解材料转移和粘附到涂层表面的机理，已经使用环境控制的真空针盘式摩擦计对M2工具钢盘上的磁控溅射TiB_2涂层进行了抗商业纯Al，Cu和Ti销的测试。采用了4.9 N的恒定负载和0.015、0.120和0.650 m / s的三种不同滑动速度。圆盘测试是在环境空气和氩气气氛下进行的。观察到以两种不同的形态发生了向TiB_2表面的材料转移，包括形成覆盖在对面的金属薄层（涂抹），以及以较大的碎片形式进行的材料转移，该碎片通常会粘附在对面上。在氩气和环境空气测试中，最小的材料转移量是从Cu针到TiB_2涂层表面。对于Al和Ti，与环境空气测试相比，氩气中附着在涂层表面的材料数量明显增多。当在氩气气氛中针对TiB_2涂层对Ti针进行测试时，出现了最严重的粘附形式。对于铝，转移材料大部分涂抹在氩气的TiB_2表面上。在环境空气中，从金属销钉上除去了更多的材料，并且在滑动过程中，转移的材料大部分变成了氧化的松散磨损碎片。可以相对于用于氧化的金属的驱动力（即，氧化物形成的标准吉布斯自由能）对形成的碎屑的相对量进行分级。铝最高，铜最低。滑动速度影响转移到TiB_2涂层表面的材料的数量和形态。对于Ti，在氩气和环境空气中，附着在TiB_2涂层表面上的材料的数量随着滑动速度的增加而增加。在高滑动速度下，粘附的颗粒大部分呈材料块的形式。此处报道的观察结果表明了测试气氛，负载条件以及金属的机械性能对金属在涂层表面的附着和转移行为的重要性。

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