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Title: FIBROUS MONOLITH WEAR RESISTANT COMPONENTS FOR THE MINING INDUSTRY

Abstract

During the reporting period, work continued on development of formulations using the materials down-selected from the initially identified contenders for the fibrous monolith wear resistant components. In the previous reporting period, a two-stage binder removal process was developed that resulted in prototype parts free of voids and other internal defects. During the current reporting period, work was performed to characterize the two-stage binder removal process for WC-Co based FM material systems. Use of this process has resulted in the fabrication of defect free sintered WC-Co FM bodies, with minimal free carbon porosity and densities approaching 100% theoretical. With the elimination of free carbon porosity and other binder removal process related defects, development work focused on optimizing the densification and eliminating defects observed in WC-Co based FM consolidated by pressureless sintering. Shrinkage of the monolithic core and shell materials used in the WC-Co based FM system was measured, and differences in material shrinkage were identified as a potential cause of cell boundary cracking observed in sintered parts. Re-formulation of material blends for this system was begun, with the goal of eliminating mechanical stresses during sintering by matching the volumetric shrinkage of the core and shell materials. Thirty-three 7/8 inch drill bitmore » inserts (WC-Co(6%)/WC-Co(16%) FM) were hot pressed during the reporting period. Six of these inserts were delivered for field-testing by Superior Rock Bit during the upcoming reporting period. In addition, Al{sub 2}O{sub 3}/Al{sub 2}O{sub 3}-TiCN FM cutting tool inserts were fabricated, and cutting tests performed.« less

Authors:
;
Publication Date:
Research Org.:
Advanced Ceramics Research Inc. (US)
Sponsoring Org.:
(US)
OSTI Identifier:
829541
DOE Contract Number:  
FC26-01NT41051
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 25 Mar 2003
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CUTTING TOOLS; DRILL BITS; FABRICATION; MINERAL INDUSTRY; FIBERS; WEAR RESISTANCE; TUNGSTEN CARBIDES; COBALT; ALUMINIUM OXIDES; TITANIUM CARBIDES; TITANIUM NITRIDES

Citation Formats

Rigali, Mark J, and Fulcher, Mike L. FIBROUS MONOLITH WEAR RESISTANT COMPONENTS FOR THE MINING INDUSTRY. United States: N. p., 2003. Web. doi:10.2172/829541.
Rigali, Mark J, & Fulcher, Mike L. FIBROUS MONOLITH WEAR RESISTANT COMPONENTS FOR THE MINING INDUSTRY. United States. https://doi.org/10.2172/829541
Rigali, Mark J, and Fulcher, Mike L. 2003. "FIBROUS MONOLITH WEAR RESISTANT COMPONENTS FOR THE MINING INDUSTRY". United States. https://doi.org/10.2172/829541. https://www.osti.gov/servlets/purl/829541.
@article{osti_829541,
title = {FIBROUS MONOLITH WEAR RESISTANT COMPONENTS FOR THE MINING INDUSTRY},
author = {Rigali, Mark J and Fulcher, Mike L},
abstractNote = {During the reporting period, work continued on development of formulations using the materials down-selected from the initially identified contenders for the fibrous monolith wear resistant components. In the previous reporting period, a two-stage binder removal process was developed that resulted in prototype parts free of voids and other internal defects. During the current reporting period, work was performed to characterize the two-stage binder removal process for WC-Co based FM material systems. Use of this process has resulted in the fabrication of defect free sintered WC-Co FM bodies, with minimal free carbon porosity and densities approaching 100% theoretical. With the elimination of free carbon porosity and other binder removal process related defects, development work focused on optimizing the densification and eliminating defects observed in WC-Co based FM consolidated by pressureless sintering. Shrinkage of the monolithic core and shell materials used in the WC-Co based FM system was measured, and differences in material shrinkage were identified as a potential cause of cell boundary cracking observed in sintered parts. Re-formulation of material blends for this system was begun, with the goal of eliminating mechanical stresses during sintering by matching the volumetric shrinkage of the core and shell materials. Thirty-three 7/8 inch drill bit inserts (WC-Co(6%)/WC-Co(16%) FM) were hot pressed during the reporting period. Six of these inserts were delivered for field-testing by Superior Rock Bit during the upcoming reporting period. In addition, Al{sub 2}O{sub 3}/Al{sub 2}O{sub 3}-TiCN FM cutting tool inserts were fabricated, and cutting tests performed.},
doi = {10.2172/829541},
url = {https://www.osti.gov/biblio/829541}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 25 00:00:00 EST 2003},
month = {Tue Mar 25 00:00:00 EST 2003}
}