H.F.Hu
,
Z.H.Chen
,
and C.J.Zhou Department of Material Engineering & Applied Chemistry
,
National University of Defense Technology
,
Changsha 410073
,
China
金属学报(英文版)
The flexural strengths and oxidative resistant properties of the ceramics derived from polycarbosilane and active fillers (Ti, TiH 2, TiB 2, Cr, and CrSi 2) were measured and characterized. The introduction of active fillers enhances slightly the flexural strengths, and further densification is required to obtain higher strengths. The oxidative resistant behaviors of the specimens with active fillers are, by means of weight gain in air, poorer compared with those without active fillers.
关键词:
polycarbosilane
,
null
,
null
,
null
H.F.Hu
,
Z.H.Chen and C.J.Zhou Department of Material Engineering & Applied Chemistry
,
National University of Defense Technology
,
Changsha 410073
,
China
金属学报(英文版)
The pyrolytic process of polycarbosilane (PCS) with active fillers (Ti, TiH 2, TiB 2, Cr, CrSi 2) is investigated. The ceramic yields with active fillers reach over 100% in N 2 atmosphere, and no shrinkage occurs when 12vol% Ti, or 4vol% Cr, or 3vol% CrSi 2 is added into PCS. XRD patterns indicate that metal carbides and nitrides form by reacting with gaseous evolution and N 2.
关键词:
polycarbosilane
,
null
,
null
,
null
,
null
