03-26
2020year
Effect of sintering parameters on spark plasma sintering of

However, the mechanism by which these sintering parameters and number of graphite foil layers affect the sintering of boron carbide are not yet well understood. Typical commercial boron carbide has impurities such as free carbon and oxygen. Oxygen impurity exists as boron oxide on the surface of boron carbide.

03-26
2020year
Sintering of B4C by Pressureless Liquid Phase Sintering

The effect of three different sintering additive systems on densification of boron carbide powder was investigated. The sintering additives were Al2O3:Y2O3, AlN:Y2O3 and BN:Y2O3 compositions. Powder mixtures were prepared with 10 vol % of sintering aids following conventional powder technology processes.

03-26
2020year
High-temperature microwave sintering of boron carbide ceramic

High-temperature microwave sintering of boron carbide ceramic armor materials used in the production and processing. High density silicon carbide / boron carbide composite ceramic flexural strength even at high temperatures of about 1400 ° C is still up to 500 ~ 600MPa.

03-26
2020year
Pressureless sintering of boron carbide - ScienceDirect

Pressureless sintering of boron carbide powder (0.5 μm) at 2375 °C yielded a pellet of 93% ρ th. Addition of zirconium dioxide was found to be beneficial in lowering the sintering temperature. Addition of zirconium dioxide was found to be beneficial in lowering the sintering temperature.

03-26
2020year
Pressureless Sintering of Hexagonal Boron Nitride Powders

Pressureless sintering of hexagonal boron nitride (BN) with and without additives was performed using a powder which was previously nitrided at 900oC and then heat treated at 1400oC. Sintering additives were B2O3 (2, 4, 6 wt %) and Y2O3 (2, 4, 6 wt %) and sintering temperatures was 1900oC.

03-26
2020year
Pressureless Sintering of Boron Carbide-Based Superhard Materials

Boron carbide-based materials B4C-MexBy were densified by pressureless sintering in a vacuum furnace. Some transition metal carbides (TiC, ZrC, HfC, Cr3C2 and WC) from groups IV-VI were used as sintering aids.

03-26
2020year
US7592279B1 - Boron carbide and boron carbide components

The boron carbide powder is pressed or cast into a compact high-green density component. The compact high-green density component is placed (disposed) into a furnace of the pressureless sintering system and the furnace is heated to a temperature in the range of about 1100 to 1400° C. in a H 2 /He gas mixture

03-26
2020year
Effect of Sintering Temperature on Density and Mechanical

May 15, 2018 · Densified silicon carbide (SiC) is prepared through dry pressing of SiC powder followed by pressureless sintering in the presence of boron carbide and carbon as the additives. Sintering of SiC parts shows the increase in density with the increase in temperature (1950-2180 °C) by resulting in higher than 98% relative density (RD) at 2150 °C

03-26
2020year
Sintering of B4C by Pressureless Liquid Phase Sintering

The effect of three different sintering additive systems on densification of boron carbide powder was investigated. The sintering additives were Al2O3:Y2O3, AlN:Y2O3 and BN:Y2O3 compositions. Powder mixtures were prepared with 10 vol % of sintering aids following conventional powder technology processes.

03-26
2020year
Pressureless sintering and mechanical properties of boron

Abstract The unique combination of extremely high hardness and low density makes boron carbide an attractive structural ceramic material. So far, the application range of boron carbide has been greatly limited by its brittleness, low strength, poor sinterability, and the need of very high sintering temperatures.

03-26
2020year
Pressureless sintering of boron carbide with an addition of

Abstract. Boron carbide B x C (x ⩾ 4) is pressureless sintered with an addition of both polycarbosilane and a small amount of phenolic resin. After testing many green mixtures, it was found that it was necessary to have a minimal addition of carbon which could denxydize the B x C and also a second phase (SiC in this work) which could act in inhibiting grain coarsening.

03-26
2020year
Pressureless sintering and properties of boron carbide

The complete densification of boron carbide ceramics is challenging if pressureless sintering is applied. The theoretical density of boron carbide is 2.52 g/cm 3. Other authors reached densification of boron carbide by presssureless sintering between 2.34 and 2.48 g/cm 3 11 depending on the doping of the boron

03-26
2020year
Pressureless Sintering of Boron Carbide - ResearchGate

Boron carbide compacts were produced by pressureless sintering at 2200 °C/2 h and 2250 °C/2 h in Ar atmosphere, using a starting powder with a particle size smaller than 3 µm.

03-26
2020year
Progress in Ceramics Series: Sintering of Ceramics

Influence of the Field and the Current Limit on Flash Sintering at Isothermal Furnace Temperatures Nickel–Boron Nanolayer‐Coated Boron Carbide Pressureless

03-26
2020year
(PDF) Pressureless sintering of boron carbide | mehri

Academia.edu is a platform for academics to share research papers.

03-26
2020year
Sintering boron carbide ceramics without grain growth by

A new ceramic sintering approach employing plastic deformation as the dominant mechanism is proposed, at low temperature close to the onset point of grain growth and under high pressure. Based on this route, fully dense boron carbide without grain growth can be prepared at 1,675–1,700 °C and

03-26
2020year
Characterization of Pressureless Sintered Boron Carbide

This report outlines the characterization study of pressureless sintered boron carbide with graphite additive used as a sintering and densification aid on hexagonally shaped and plate-shaped samples of boron carbide. We conducted this investigation to

03-26
2020year
Sintering boron carbide ceramics without grain growth by

Oct 27, 2015 · Sintering boron carbide ceramics without grain growth by plastic deformation as the dominant densification mechanism Skip to main content Thank you for visiting nature.com.

03-26
2020year
Pressureless Sintering of Boron Carbide-Based Superhard Materials

Boron carbide-based materials B4C-MexBy were densified by pressureless sintering in a vacuum furnace. Some transition metal carbides (TiC, ZrC, HfC, Cr3C2 and WC) from groups IV-VI were used as sintering aids. The optimal sintering temperature in the range 2220-2250oC was used for any composition.

03-26
2020year
Novel Processing of Boron Carbide (B4C): Plasma Synthesized

Boron carbide, most often used in personnel armor systems, is rather difficult to form and is almost always densified from ceramic powders under heat and pressure. Recent developments by PPG and Georgia Tech are allowing for the full densification of nano-sized powders through a pressureless sintering route.