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Title: A comparison study on the densification behavior and mechanical properties of gelcast vs conventionally formed B{sub 4}C sintered conventionally and by microwaves

Abstract

The utilization of microwave energy for reaching high temperatures necessary to densify B{sub 4}C powder is compared with conventional means of sintering by evaluating the mechanical properties after densification. Microwave energy has been shown to be an effective means for achieving high sintered densities, even though temperatures of {approximately} 2,250 C are required. In this study, green preforms of B{sub 4}C specimens were sintered by both conventional and microwave heating. This study also utilized an advanced forming method called ``Gelcasting`` developed at ORNL. Gelcasting is a fluid forming process whereby high solids suspensions of powders containing dissolved monomers are cast into a mold, then polymerized or ``gelled`` in situ. This investigation compares microstructures and mechanical properties of both Gelcast B{sub 4}C and ``conventionally`` die-pressed B{sub 4}C. The microstructures and final mechanical properties of B{sub 4}C specimens are discussed.

Authors:
;  [1]; ;  [2]
  1. Oak Ridge National Lab., TN (United States)
  2. Y-12 Development Div., Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab., TN (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
244628
Report Number(s):
CONF-960401-35
ON: DE96010670; TRN: 96:014592
DOE Contract Number:  
AC05-96OR22464
Resource Type:
Technical Report
Resource Relation:
Conference: Spring meeting of the Materials Research Society (MRS), San Francisco, CA (United States), 8-12 Apr 1996; Other Information: PBD: [1996]
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BORON CARBIDES; MICROSTRUCTURE; MECHANICAL PROPERTIES; FABRICATION; COMPARATIVE EVALUATIONS; EXPERIMENTAL DATA; HARDNESS; FRACTURE PROPERTIES

Citation Formats

Menchhofer, P A, Kiggans, J O, Morrow, M S, and Schechter, D E. A comparison study on the densification behavior and mechanical properties of gelcast vs conventionally formed B{sub 4}C sintered conventionally and by microwaves. United States: N. p., 1996. Web. doi:10.2172/244628.
Menchhofer, P A, Kiggans, J O, Morrow, M S, & Schechter, D E. A comparison study on the densification behavior and mechanical properties of gelcast vs conventionally formed B{sub 4}C sintered conventionally and by microwaves. United States. https://doi.org/10.2172/244628
Menchhofer, P A, Kiggans, J O, Morrow, M S, and Schechter, D E. Sat . "A comparison study on the densification behavior and mechanical properties of gelcast vs conventionally formed B{sub 4}C sintered conventionally and by microwaves". United States. https://doi.org/10.2172/244628. https://www.osti.gov/servlets/purl/244628.
@article{osti_244628,
title = {A comparison study on the densification behavior and mechanical properties of gelcast vs conventionally formed B{sub 4}C sintered conventionally and by microwaves},
author = {Menchhofer, P A and Kiggans, J O and Morrow, M S and Schechter, D E},
abstractNote = {The utilization of microwave energy for reaching high temperatures necessary to densify B{sub 4}C powder is compared with conventional means of sintering by evaluating the mechanical properties after densification. Microwave energy has been shown to be an effective means for achieving high sintered densities, even though temperatures of {approximately} 2,250 C are required. In this study, green preforms of B{sub 4}C specimens were sintered by both conventional and microwave heating. This study also utilized an advanced forming method called ``Gelcasting`` developed at ORNL. Gelcasting is a fluid forming process whereby high solids suspensions of powders containing dissolved monomers are cast into a mold, then polymerized or ``gelled`` in situ. This investigation compares microstructures and mechanical properties of both Gelcast B{sub 4}C and ``conventionally`` die-pressed B{sub 4}C. The microstructures and final mechanical properties of B{sub 4}C specimens are discussed.},
doi = {10.2172/244628},
url = {https://www.osti.gov/biblio/244628}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1996},
month = {6}
}