02-07
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.

02-07
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

02-07
2020year
Sintering of boron carbide (Thesis/Dissertation) | OSTI.GOV

@article{osti_5348574, title = {Sintering of boron carbide}, author = {Dole, D.L.}, abstractNote = {The sintering behavior of compositions near B/sub 4/C exhibited limited densification at temperatures up to 2300/sup 0/C. Microstructural evaluation of B/sub 4/C at various stages in the sintering process indicate that surface to surface transport causes coarsening of the pore-grain structure.

02-07
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.

02-07
2020year
Solid-state pressureless sintering of silicon carbide below

Two-step sintering (TSS) method can allow to set sintering temperature lower than that conventionally required. So, pressureless two-step sintering process was successfully applied for solid-state sintering (boron carbide and carbon as sintering additives) of commercial SiC powder at 1980 °C.

02-07
2020year
Pressureless sintering of boron carbide with Cr3C2 as

In this study, chromium carbide (Cr 3 C 2) was selected as the sintering additive for the densification of boron carbide (B 4 C). Cr 3 C 2 can react with B 4 C and form graphite and CrB 2 in situ, which is considered to be effective for the sintering of B 4 C composites.

02-07
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.

02-07
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.

02-07
2020year
Pressureless sintering of boron carbide ceramics

Densification of boron carbide (B 4 C) was studied by pressureless sintering at temperatures ranging from 2108° to 2226°C with Al gas and Si compound gas derived from SiC. High purity boron carbide compacts attained a bulk density of a nearly full density (2.455 g/cm 3) after being sintered at

02-07
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.

02-07
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.

02-07
2020year
(PDF) Pressureless sintering of boron carbide | mehri

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

02-07
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

02-07
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.

02-07
2020year
Boron Carbide Sintering Furnace(id:10457870). Buy China heat

Sintering furnace. Application: IF silicon carbide sintering furnace is a batch-type of induction heating furnace, m ainly used in the sintering of hard alloy and powder metallurgy industry producing size of silicon carbide powder, silicon carbide seal ceramic sintering, pressureless sintering of silicon carbide and titanium carbide powder and vanadium carbide powder and metal powder and

02-07
2020year
Pressureless sintering of boron carbide | Request PDF

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.

02-07
2020year
Pressureless sintering and properties of boron carbide

Abstract Boron carbide and Tantalum boride composites were prepared by pressureless sintering of B4C with addition of TaC powder. The effect of TaC addition on the sinterability of boron carbide wa

02-07
2020year
Pressureless sintering of boron carbide phase: AIP Conference

While industrial hot pressing of boron carbide is well known, pressureless sintering is new.Two commercial boron carbide powders are used; the first one was synthetized by an arc‐melting technique (B powder) and the second one by a magnesiothermal reaction (A powder).

02-07
2020year
Pressureless Sintering Of Zirconium Diboride Obtained By

the present work, pressureless sintering of ZrB 2 obtained by magnesiothermic MASHS was studied for its purification and densification. The effects of additives (boron carbide and molybdenum silicide) and operating parameters (milling time and initial density) on the density and composition of the final product were investigated.

02-07
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.