高如琴
,
吴洁琰
,
王紫括
,
郝丹迪
硅酸盐通报
采用粉煤灰为主要原料,铝矾土、高岭土、长石为烧结助剂,制备粉煤灰基支撑剂.结合TG-DTA、SEM、EDS、XRD等现代测试手段对样品的结构和性能进行了表征.结果表明:材料主要以O,Al,Si等元素为主,主晶相为莫来石和石英,晶粒之间有大量5 ～10 μm的气孔.材料具有较好的圆球度,粒径为0.5 ～0.8 mm的煤层压裂陶粒支撑剂,体密度为0.998 g/cm3,视密度为2.559 g/cm3,酸溶解度为0.284％,22 MPa条件下,抗压破碎率为8.241％,导流能力67.24 μm2·cm.
关键词:
粉煤灰
,
支撑剂
,
煤层压裂
,
结构和性能
HUANG Qizhong
,
YANG Qzaoqin and WU Lijun(Powder Metallurgy Research institute
,
Central Sonth University of Technology
,
Changsha 410083
,
China Materials Research and Test Center
,
Hnnan University
,
Changsha 410082
,
ChinaLab. of Atomic Imaging of Solids
,
Institute of Metal Research
,
Chinese Academy of Sciences
,
Shenyang110015
,
ChinaState Key Laboratory for Corrosion and Protection
,
Institute of Corrosion and Protection of Metals
,
Chinese Academy of Sciences
,
Shenyang 110015
,
China)Manuscript received 4 August 1995
,
in revised form 6 April 1996
金属学报(英文版)
A Preliminary study of the effect of silicon additive on the structure and properites of C-B_4C-SiC composite was conducted. A liquid Phase has formed and the liquid Si reacts with C to form SiC at the grain boundary when sintering, which accelerates the sintering process and retards the grain growth. Consequently, the density and strength of the composite increase markedly. And the increase in the density increases the oxidation resistance and decreases the specific resistance of the composite. Furthermore,the C-B_4 C-SiC composite has good heat-shock resistance. The phenomena may be dueto the strengthening and toughening of microcracks.
关键词:
:Si additive
,
null
,
null
