Polymer-derived Si-C-Ti systems: From titanium nanoparticle-filled polycarbosilanes to dense monolithic multi-phase components with high hardness

被引：30

作者：

Proust, Vanessa ^{[1
]}

Bechelany, Mirna Chaker ^{[1
]}

Ghisleni, Rudy ^{[2
]}

Beaufort, Marie-France ^{[3
]}

Miele, Philippe ^{[1
]}

Bernard, Samuel ^{[1
]}

机构：

[1] Univ Montpellier, IEM Inst Europeen Membranes, CNRS, UMR 5635,ENSCM, Pl E Bataillon, F-34095 Montpellier, France

[2] Empa, Swiss Fed Labs Mat Testing & Res, Lab Mech Mat & Nanostruct, Feuerwerkerstr 39, CH-3602 Thun, Switzerland

[3] Univ Poitiers, Inst Pprime, ENSMA, CNRS,UPR 3346,Dept Phys & Mecan Mat, Bd Marie & Pierre Curie,BP 30179, F-86962 Futuroscope, France

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2016年 / 36卷 / 15期

关键词：

Preceramic polymer; Allylhydridopolycarbosilane; Casting; Pyrolysis; (nano)composites; Dense; Si-C-Ti; THERMAL-DECOMPOSITION; CERAMICS; FABRICATION; NANOCOMPOSITES; PRECURSORS; NITRIDE; ROUTE;

D O I：

10.1016/j.jeurceramsoc.2016.04.023

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This paper describes the fabrication of Si-C-Ti ceramics from titanium nanoparticle filled allylhydridopolycarbosilanes (Ti NP-filled AHPCS) using a casting/curing technique followed by pyrolysis at 1000 degrees C under argon. TGA and XRD have been applied to investigate the mass loss behaviour during ceramization and to gain structural information on the decomposition process of Ti NP-filled AHPCS. TiC is the first phase to nucleate in an amorphous SiC matrix around 800 degrees C, whereas titanium silicide and MAX phases grow between 800 and 1000 degrees C. Densities measurements have been done and structural characterization of the final specimens is carried out using XRD and Raman spectroscopy. The process leads to (nano)composites with a density increasing from 2.45 to 2.90 g/cm(3) and a Vickers hardness ranging from 17 to 20.9 GPa according to the AHPCS:Ti ratio fixed in the early stage of the process. The titanium silicide and MAX phases are decomposed during a further heat-treatment between 1000 and 1400 degrees C to generate TiC/SiC (nano)composites. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：3671 / 3679

页数：9