Flash sintering feasibility study and localized densification in boron carbide
Abstract
The feasibility of flash sintering boron carbide (B4C) was investigated using a direct current (DC) electric field across different electrodes, field strengths, and thermal profiles. Flash behavior was observed at furnace temperatures as low as 386°C with field strengths of 68‐278 V/cm, but only a small channel of the specimen was densified due to hot spot effects. Application of a 2.2 V/cm·s voltage ramp at a constant temperature of 550°C caused uniform heating, but at temperatures too low for sintering. Scalable densification of B4C at low furnace temperatures with flash sintering is theorized to be possible by applying a higher current density through power supply or specimen modifications.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 24, 2021
- Source ID
- 10.1111/jace.17833
Entities
People
- Andrew Rosenberger
- Aubrey L. Fry
- Raymond E. Brennan
Organizations
- Pennsylvania State University
- United States Army Combat Capabilities Development Command
- United States Army Research Laboratory