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Environmental and resource aspects of substituting cemented carbide with polycrystalline diamond: The case of machining tools
Chalmers University of Technology, Sweden.
RISE Research Institutes of Sweden.ORCID iD: 0000-0003-3802-7260
RISE Research Institutes of Sweden, Materials and Production, Product Realisation Methodology.ORCID iD: 0000-0003-1826-8665
RISE Research Institutes of Sweden, Materials and Production, Product Realisation Methodology.
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2020 (English)In: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 277, article id 123577Article in journal (Refereed) Published
Abstract [en]

Synthetic diamond competes with the conventional cemented carbide (WC–Co) tool material in some applications due to its extreme hardness. However, so far, these materials have not been compared from a life cycle perspective regarding their environmental and resource impacts. The aims of this study are i) to provide detailed life cycle assessment (LCA) results for industrial polycrystalline diamond (PCD) production from diamond grit produced via high-pressure high-temperature (HPHT) synthesis and ii) to conduct the first comparative LCA of PCD and WC-Co tools for the cases of wood working and titanium alloys machining. The results show that the main hotspot in HPHT synthesis of diamond grit, which is the main precursor to PCD, is the use of WC-Co in the high-pressure apparatus. In PCD tool production, the electricity input and the use of tungsten and molybdenum contribute the most to environmental and resource impacts. The environmental and resource impacts of the PCD tool production can be reduced with 53–83% if solar electricity and full WC-Co recycling is applied. The comparison shows high environmental and resource improvements when substituting WC-Co tools with PCD tools in wood working, but not in titanium alloys machining. © 2020 The Authors

Place, publisher, year, edition, pages
Elsevier Ltd , 2020. Vol. 277, article id 123577
Keywords [en]
Diamond grit, High-pressure high-temperature (HPHT), Life cycle assessment (LCA), Life cycle inventory (LCI), Titanium alloys machining, Wood working, Artificial life, Carbide tools, Carbides, Diamond cutting tools, Environmental impact, High pressure effects in solids, High pressure engineering, Synthetic diamonds, Titanium alloys, Woodworking, Cemented carbides, High pressure apparatus, High pressure high temperature, HP-HT synthesis, Life cycle perspectives, Polycrystalline diamonds, Solar electricity, Life cycle
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Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-47672DOI: 10.1016/j.jclepro.2020.123577Scopus ID: 2-s2.0-85089742615OAI: oai:DiVA.org:ri-47672DiVA, id: diva2:1463253
Note

Funding details: Stiftelsen för Miljöstrategisk Forskning; Funding text 1: The financial support from Mistra Environmental Nanosafety Phase II, funded by the Swedish Foundation for Strategic Environmental Research (Mistra), is gratefully acknowledged. In addition, we would like to thank the collaborators, Åke Andersin and Wayne Leahy, who provided valuable information to this study.

Available from: 2020-09-01 Created: 2020-09-01 Last updated: 2023-05-25Bibliographically approved

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Fransson, KristinZackrisson, Mats

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