Tribological properties of boric acid and boric acid forming surfaces: Part 1, Crystal chemistry and self-lubricating mechanism of boric acid

Conference · Mon Jan 01 04:00:00 EST 1990

OSTI ID:7258000

Erdemir, A

An in-depth understanding of the atomic-scale structure and chemistry of self-lubricating solids and how they relate to the efficiency and endurance of large-scale tribosystems is critically important. Of particular interest is the utilization of this understanding for the development of mechanistic models that can increase our ability to assess and predict the capabilities of self-lubricating solids. Accordingly, a comprehensive investigation was made of the crystal chemistry and self-lubrication mechanisms of boric acid and boric acid-forming surfaces. In this paper, the fundamentals of the crystal chemistry and the proposed lubrication mechanism of boric acid are described. Pin-on-disk tests performed on cold-pressed boric-acid pins and AISI 52100 steel disks, showed that the friction coefficient of this tribosystem is approximately 0.1. The results of this investigation indicate that boric acid, owing to its unique crystal structure and bond characteristics, is a promising solid lubricant for a wide range of tribological applications. 18 refs., 5 figs.

• Research Organization: Argonne National Lab., IL (USA)
• Sponsoring Organization: DOE/CE
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 7258000
• Report Number(s): CONF-900588-1; ON: DE90005665
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
BORIC ACID
CARBON
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHEMISTRY
COMPARATIVE EVALUATIONS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DECOMPOSITION
ELECTRON MICROSCOPES
ELEMENTAL MINERALS
ELEMENTS
FRICTION FACTOR
GRAPHITE
HYDROGEN COMPOUNDS
INORGANIC ACIDS
LAYERS
LUBRICATING PROPERTIES
MEASURING METHODS
MECHANICAL PROPERTIES
MICROSCOPES
MINERALS
MOLYBDENUM COMPOUNDS
MOLYBDENUM SULFIDES
NONMETALS
ORTHORHOMBIC LATTICES
PERFORMANCE TESTING
PHYSICAL PROPERTIES
REFRACTORY METAL COMPOUNDS
RHEOLOGY
SULFIDES
SULFUR COMPOUNDS
TEMPERATURE EFFECTS
TESTING
TRANSITION ELEMENT COMPOUNDS
TRIBOLOGY
TRICLINIC LATTICES
WATER CHEMISTRY