Improving Pressure–Velocity Limit of Mechanical Seal with Polycrystalline Diamond Coating
Source abstract
Abstract
Polycrystalline diamond (PCD)-coated mechanical seal rings were prepared by hot filament chemical vapor deposition (HFCVD) on graphite-loaded silicon carbide (GSiC) substrates. From the initial deposition process, the diamond first nucleated and then grew into a dense coating with grain size of 4 μm and thickness of 12.3 μm. The well-grown PCD coating, as confirmed by Raman spectroscopy and X-ray diffractometry, significantly improves the pressure–velocity limit of the mechanical seal applied in harsh operating conditions, no matter whether for a hard-to-soft mating combination or a hard-to-hard mating combination. Comparing GSiC against sintered silicon carbide (SSiC) combination (GSiC/SSiC), GSiC against graphite combination (GSiC/graphite) and PCD against graphite combination (PCD/graphite), PCD against SSiC combination (PCD/SSiC) shows the highest pressure velocity (PV) limit of 42.31 MPa·m/s with 4 kN loading at 4500 rpm rotation speed. An extremely low and stable friction coefficient and super mechanical properties under harsh conditions can be approved as the source of the high PV limit of PCD coating. A mechanical seal with PCD coating can be used for more demanding applications.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Diamond and Carbon-based Materials Research · Lubricants and Their Additives · Tribology and Lubrication Engineering
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Laboratory of Marine New Materials and Related Technology, Zhejiang Key Laboratory of Marine Materials and Protection Technology, Ningbo Institute of Material Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Ningbo FLK Technology CO. LTD., Ningbo 315104, China
Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
Funding
Ningbo Marine Economy Innovation and Development Demonstration Project of State Oceanic Administration and Ministry of Finance, China, · Advanced Postdoctoral Programs of Zhejiang Province, China
References (23)
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