Recycling technique for CVD diamond coated cutting tools

Liu, H.; Hanyu, Hiroyuki; Murakami, Yoshio; Kamiya, Shoji; Saka, Masumi

doi:10.1016/s0257-8972(00)01081-1

Cited by 8 publications

(7 citation statements)

References 3 publications

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“…The main characteristics of the coatings are independent of the nature of the ligands as deduced from the use of Cr(C 6 H 6 ) 2 , Cr (C 6 H 5 i Pr) 2 and Cr(C 6 H 5 Et) 2 [19,20]. As a result, a mixture of different bis(arene)Cr precursors can be used as in [63,64] and in this work.…”

Section: Key Points Making Recycling Possible: Selection Of Precursormentioning

confidence: 94%

“…It is in fact a viscous liquid mixture of several bis(arene)chromium compounds with the general formula [(C 2 H 5 ) x C 6 H 6-x ] 2 Cr where x = 0-4 and BEBC is the major constituent. A solution in anhydrous toluene (99.8%) from Sigma-Aldrich (CAS 108-88-3) was prepared under inert atmosphere with a concentration of 3 × 10 − 1 mol·L − 1 (4 g of BEBC in 50 mL of toluene).…”

Section: Deposition Processmentioning

confidence: 99%

“…Indeed, though the coating and the substrate generally form strong and inseparable pairs there are examples where the substrate can be separated and recycled in CVD process to reduce the production cost. For instance in diamond coated cutting tools the worn coating was removed to apply a new one by the same CVD process [2] and, in the graphene CVD synthesis the Cu substrate used as catalyst was recycled after delamination because it is an expensive substrate [3].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Chromium carbide growth at low temperature by a highly efficient DLI-MOCVD process in effluent recycling mode

Michau

Maury

Schuster

et al. 2017

Surface and Coatings Technology

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in : http://oatao. The effect of direct recycling of effluents on the quality of Cr x C y coatings grown by MOCVD using direct liquid injection (DLI) of bis(ethylbenzene)chromium(0) in toluene was investigated. The results are compared with those obtained using non-recycled solutions of precursor. Both types of coatings exhibit the same features. They are amorphous in the temperature range 673-823 K. They exhibit a dense and glassy-like microstructure and a high hardness (> 23 GPa). Analyses at the nanoscale revealed a nanocomposite microstructure consisting of free-C domains embedded in an amorphous Cr 7 C 3 matrix characterized by strong interfaces and leading to an overall composition slightly higher than Cr 7 C 3 . The stiffness and strength of these interfaces are mainly due to at least two types of chemical bonds between Cr atoms and free-C: (i) Cr intercalation between graphene sheets and (ii) hexahapto η 6 -Cr bonding on the external graphene sheets of the free-C domains. The density of these interactions was found increasing by decreasing the concentration of the injected solution, as this occurred using a recycled solution. As a result, "recycled" coatings exhibit a higher nanohardness (29 GPa) than "new" coatings (23 GPa). This work demonstrates that using bis(arene)M(0) precursors, direct recycling of effluents is an efficient route to improve the conversion yield of DLI-MOCVD process making it cost-effective and competitive to produce protective carbide coatings of transition metals which share the same metal zero chemistry.

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Section: Key Points Making Recycling Possible: Selection Of Precursormentioning

confidence: 94%

Section: Deposition Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Chromium carbide growth at low temperature by a highly efficient DLI-MOCVD process in effluent recycling mode

Michau

Maury

Schuster

et al. 2017

Surface and Coatings Technology

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“…A microwave approach for recycling hard metal tools produced by chemical vapour deposition technique was proposed by Liu et al [333].…”

Section: Recyclingmentioning

confidence: 99%

The Critical Raw Materials in Cutting Tools for Machining Applications: A Review

et al. 2020

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A variety of cutting tool materials are used for the contact mode mechanical machining of components under extreme conditions of stress, temperature and/or corrosion, including operations such as drilling, milling turning and so on. These demanding conditions impose a seriously high strain rate (an order of magnitude higher than forming), and this limits the useful life of cutting tools, especially single-point cutting tools. Tungsten carbide is the most popularly used cutting tool material, and unfortunately its main ingredients of W and Co are at high risk in terms of material supply and are listed among critical raw materials (CRMs) for EU, for which sustainable use should be addressed. This paper highlights the evolution and the trend of use of CRMs) in cutting tools for mechanical machining through a timely review. The focus of this review and its motivation was driven by the four following themes: (i) the discussion of newly emerging hybrid machining processes offering performance enhancements and longevity in terms of tool life (laser and cryogenic incorporation); (ii) the development and synthesis of new CRM substitutes to minimise the use of tungsten; (iii) the improvement of the recycling of worn tools; and (iv) the accelerated use of modelling and simulation to design long-lasting tools in the Industry-4.0 framework, circular economy and cyber secure manufacturing. It may be noted that the scope of this paper is not to represent a completely exhaustive document concerning cutting tools for mechanical processing, but to raise awareness and pave the way for innovative thinking on the use of critical materials in mechanical processing tools with the aim of developing smart, timely control strategies and mitigation measures to suppress the use of CRMs.

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“…After the resin binder was burn up, diamond grains within abrasive layer were dropped from wheel substrate. Liu et al [10]…”

Section: Introductionmentioning

confidence: 99%

Design of assembled substrate of electroplated diamond grinding wheel for disassembly of abrasive layer

Chen

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

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Expensive diamond grains remaining within waste diamond grinding wheels and wheel substrate need to be recycled. Electroplated diamond grinding wheel was taken as an example. An idea of "substrate structure-induced cracks (SSIC)" was proposed to solve the disassembly problem of waste electroplated diamond wheels. An assembled substrate for electroplated diamond grinding wheel was designed. Fabrication and disassembly experiments of electroplated diamond wheel with assembled substrate were carried out. Also, finite element analysis was used to investigate the mechanism of disassembly processes. Recycling experiments of electroplated diamond wheels were carried out in three ways, namely acid corrosion method, electrolysis method and SSIC method. The experimental results show that cracks generate in the diamond abrasive layer of the assembled wheel. The simulated maximum principal stress occurs on diamond abrasive layer near the mating surface between cylindrical pins and substrate, which is consistent with the location where the crack is created. The abrasive layer can be easily peeled off from substrate after the cracks occur on abrasive layer. Compared with electrolysis and acid corrosion methods, the SSIC method has the shortest disassembly time and the lowest disassembly costs. The assembled substrate provides possibility to exert cracking forces from substrate to diamond abrasive layer. With assembled substrate, the nondestructive disassembly of electroplated diamond wheel can be fulfilled. Assembled substrate can meet the need of DFD for electroplated diamond grinding wheel.

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Recycling technique for CVD diamond coated cutting tools

Cited by 8 publications

References 3 publications

Chromium carbide growth at low temperature by a highly efficient DLI-MOCVD process in effluent recycling mode

Chromium carbide growth at low temperature by a highly efficient DLI-MOCVD process in effluent recycling mode

The Critical Raw Materials in Cutting Tools for Machining Applications: A Review

Design of assembled substrate of electroplated diamond grinding wheel for disassembly of abrasive layer

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