Tissue engineered scaffolds were prepared from blends of poly(L-lactide) (PLLA) and poly(ε- caprolac-tone) (PCL) by gelation-freeze-drying. The morphology of scaffolds with PLLA/PCL compositions of 100/0, 90/10, 80/ 20, 70/30 (wt% ) under different solvent exchange conditions was studied.
The best VR coating was obtained by the following technics: room temperature- 1700/℃2hr→1700℃/lhr→1700℃-1900 ℃/lhr→1900℃/lhr , which is thought of a kind of perfect coating not only because of its continuous distribution and uniformity of SiC tissues and eliminating cracks produced during period of preparing process by better graded distrubution,but also because of the SiC whiskers preparedaccompanyly in the coating.
Carbon/carbon composites (C/C) prepared by chemical vapor deposition (CVD) are reviewed in this paper, which mainly covers the fabrication methods, the influential factors, the tissues of pyrolytic carbon and the deposition mechanisms involved in the process.
Organic-inorganic hybrid materials have been extensively studied due to their potential applications of such materials to living tissues, photochemistry, electromagnetism, catalysis, adsorption, and so on.
This paper probes into the application of case teaching in the teaching of material mechanics from the case teaching,the organization form of case teaching and some problems that should pay attention to in the case teaching.
Then, have studied the temperature retention time and alloying element Cu, Ni for response to influence of the organization and properties of TiC_p/Fe composites. The result shows: The longer temperature retention time is , the more TiC_p produced are.
④The organization and composition of Mg-Al-Srternary alloy were relation to the value of Sr/Al. as the value increasing,the second phase Al4Sr was gradually changed into Mg17Al12,Mg-Al-Sr ternary compound,and Al4Sr.
TG,SEM,TEM,IR,XRD and N_2 absorption-desorption were carried out to characterize the as-synthesized materials ,in order to investigate the factors affecting organization,morphology and porous structure of as-synthesized materials of synthesis procedure such as pH values、 time of hydrothermal synthesis、 crystallization temperature ,calcinations condition and so on.