Triode plasma diffusion treatment of titanium alloys
Triode plasma diffusion treatment of titanium alloys
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钛合金的三极管等离子体扩散处理
DOI：
10.1016/j.surfcoat.2012.09.006
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发表时间：
2012
影响因子：
5.4
通讯作者：
Cassar G
中科院分区：
文献类型：
--
作者：
Cassar G
本文研究了二元β钛合金Ti-15Mo的组织、性能和摩擦学性能。采用低压三极管等离子体扩散工艺提高了该材料的耐磨性，并将其与更受欢迎的α+β合金Ti-6Al-4V的等效工作进行了比较。为了研究这些材料，采用了x射线衍射、微纳压痕硬度、表面轮廓术、光学显微镜、电子背散射衍射和球-板往复磨损试验。这些技术显示了两种钛合金之间的明显差异，不仅在它们的结构和性能上，而且在它们对所研究的表面工程处理的反应上。研究发现，当等离子体扩散处理时，相对粗粒度的Ti-15Mo的表面粗糙度增加较大，特别是在使用氮来提供活性电离气体的情况下。然而，物理气相沉积（PVD）薄的纯α- ti层可以有效地将这种粗化效果降低到可接受的水平，而不会影响扩散处理在涂层硬度和深度方面的效果。一旦在未经处理的Ti-15Mo上沉积了一层薄薄的α- ti PVD层，通过氮等离子体扩散处理或双相工艺程序（包括最终沉积一层硬的PVD TiN陶瓷涂层）可以显著提高该合金的耐磨性。此外，本文的结果表明，三极管等离子体氧化也是一种简单（但非常有效）的方法，可用于大幅提高该合金的摩擦学性能，其中仔细控制（氧化物）化合物层的形成可以产生坚硬耐磨的表面，而无需双相PVD涂层。
In this paper the structure, properties and tribological behaviour of the binaryβtitanium alloy Ti–15Mo have been investigated. Low-pressure triode plasma diffusion processes were used to improve the wear resistance of this material and the results were compared with equivalent work carried out on the more popular and better knownα+βalloy, Ti–6Al–4V. In order to study these materials, X-ray diffraction, micro- and nano-indentation hardness, surface profilometry, optical microscopy, electron backscatter diffraction and ball-on-plate reciprocating wear testing were employed. These techniques show stark differences between the two titanium alloys, not only in their structure and properties, but also in their response to the surface engineering treatments investigated. It was found that the relatively coarse-grained Ti–15Mo experiences a larger increase in surface roughness when plasma diffusion-treated, particularly where nitrogen is used to provide the active ionised gas species. However, physical vapour deposition (PVD) of a thin pureα-Ti layer can effectively reduce this roughening effect to acceptable levels without compromising the diffusion treatment efficacy in terms of the case hardness and depth achieved. Once a thin PVD layer ofα-Ti has been deposited onto the untreated Ti–15Mo, significant improvements in the wear resistance of this alloy can be achieved by either nitrogen plasma-diffusion treatment or by a duplex process routine which includes the final deposition of a hard PVD TiN ceramic coating. Furthermore, the results presented here show that triode plasma oxidation is also a simple (yet very effective) method that can be used to drastically improve the tribological performance of this alloy, where the careful control of (oxide) compound layer formation can produce a hard and wear-resistant surface without the need for duplex PVD coating.
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影响因子：
5
作者：
Cassar, G.;Wilson, J. C. Avelar-Batista;Leyland, A.
通讯作者：
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DOI：
--
发表时间：
1991
期刊：
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DOI：
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期刊：
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DOI：
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发表时间：
2001
期刊：
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DOI：
--
发表时间：
1968
期刊：
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