Phase evolution of matrix of C/SiCN composite during creep testing at 1300 C
Journal Title: Carbon - Science and Technology - Year 2009, Vol 2, Issue 1
Abstract
Tensile creep behavior of carbon fiber-reinforced SiCN matrix composite (C/SiCN) was investigated at 1300 °C under vacuum and 45 MPa for 30 h. As-received and 1700 °C-heat treated samples were prepared. Phase evolution and microstructure of C/SiCN was examined by virtue of X-ray diffraction, scanning electron microscope and high resolution transmission electron microscopy. It was found that crystallization happened in the as-received C/SiCN after 1300 °C creep tested for 1h, though many researches indicate that the crystallization of amorphous SiCN occur above 1400 °C heat treated. The matrix of as-received C/SiCN partly transformed from amorphous to β-SiC firstly and then α-SiC in the temperature range from 0 h to 15 h. The intensity of diffraction peaks had no significant change from 15 h to 30 h.The results revealed the applied stress promotes the occurrence of crystallization in as received C/SiCN. But the 1700 °C-heat treated specimen showed little change of XRD patterns after creep testing.
Authors and Affiliations
Qiang-Qiang Wang, Sheng-Ru Qiao (*), Yi-Xia, Guofeng Lu, Cheng –Yu Zhang
Keywords
Related Articles
- EP ID EP49872
- DOI -
- Views 230
- Downloads 0
Effect of temperature on micropore of activated carbon from sticky rice straw by H3PO4 activation
Microporous activated carbon was prepared from sticky rice straw using activated phosphoric acid. The effects of carbonization temperature, activation temperature, and phosphoric acid on physical and chemical properties...
Development of new metal matrix composite electrodes for electrical discharge machining through powder metallurgy process
Electrical discharge machining (EDM) is one of the widely used nontraditional machining methods to produce die cavities by the erosive effect of electrical discharges. This method is popular due to the fact that a relati...
Eco-friendly synthesis of Graphene using the aqueous extract of Amaranthus dubius
An eco-friendly process of reduction of graphene oxide using aqueous extract of Amaranthus dubius under refluxing method is herein reported. The colour change of the graphene oxide (GO) solution from brown to black was n...
Effect of precursors on the solid-state synthesis of semiconducting PbS nanostructures
In this communication, we report facile and economical in-situ preparation of lead sulphide (PbS) nanorods and nanocubes within the Polyphenylene sulphide (PPS) matrix. PPS plays a dual role in the synthesis of the resul...
Nutrient recovery and energy efficient algal harvest from anaerobic digestor wastewater
The increasing levels of generation of wastewaters which are nutrient rich pose serious issues where conventional biological and chemical methods of treatment have failed in meeting sustainability challenges. In this stu...