A silicoboron carbonitride ceramic stable to 2,000°C

Borazine Based Molecular Single Source Precursors for Si/B/N/C Ceramics

“…Random networks consisting of Si, B, N, and C represent a new class of ceramics that are exclusively accessible along a molecular -polymer precursor route [1][2][3][4][5][6][7]. Single source molecular precursors of the general type R 1 R 2 R 3 Si-X-BR 4 R 5 with X = NH [1, [8][9][10], N(CH 3 ) [11][12][13], CH 2 [14,15], C 2 H 4 [16] and R 1 -R 5 = CH 3 or Cl have proven to perform particularly well with respect to versatility and quality of the final ceramic.…”

Atomic Structure and Diffusion in Amorphous Si-B-C-N by Molecular Dynamics Simulation

“…[13][14][15] These experiments indicated that the amorphous network of Si-B-N is composed of SiN 4 and BN 3 structural units and has a homogeneous distribution of elements through the amorphous state. Heinemann et al also studied short-range atomic ordering and elemental distribution in amorphous Si-B-N and Si-B-C-N, from their pair distribution functions and highresolution elemental mapping using energy-filtering transmission electron spectroscopy.…”

“…This is because these are expected to dominate in the network structure of amorphous Si-N, Si-B-N and Si-B-C-N according to previous studies. 4,6,16) Amorphous structures calculated by MD were analyzed in terms of pair distribution functions (PDFs). A total PDF G(r) is calculated as…”

“…• C. 4) Very recently, Wang et al also reported that amorphous Si-B-C-N keeps its amorphous state up to 2200…”

“…[1][2][3][4][5][6][7][8] Amorphous Si 3 N 4 -based materials, such as Si-C-N and Si-B-N, can be prepared via polymer pyrolysis using suitable precursors. One of their interesting properties is that these materials are able to maintain the amorphous state at more than 1500…”