Amorphous Co-B/Al nanocomposites prepared by electroless coating technique and their excellent catalytic activity

作者：Cheng Zhipeng^*; Xu Jiming; Zhong Hui; Yang Yi; Li Fengsheng

来源：Rare Metals, 2010, 29(1): 32-36.

DOI：10.1007/s12598-010-0006-6

• nanocomposites
• catalysts
• electroless coating
• ammonium perchlorate

To improve the catalytic activity of amorphous Co-B alloys, Co-B coated aluminum (Co-B/Al) nanocomposites were prepared by electroless coating technique and evaluated as additives for the catalytic performance of ammonium perchlorate (AP) and AP-based solid state propellants. X-ray diffractometry (XRD), scanning electron microscopy (SEM), inductive coupled plasma emission spectrometry (ICP), differential scanning calorimetry (DSC) as well as strand burner method were employed to characterize the crystal phase, morphologies, chemical composition, and catalytic activity of the as-synthesized material. The results show that a continuous layer of about 100 nm amorphous Co(72.6)B(27.4) covers the surfaces of Al particles. Addition of the as-synthesized Co-B/Al nanocomposites as catalysts promotes AP decomposition, enhances the burning rate, and lowers the pressure exponent of the AP-based propellants considerably.

• 出版日期2010-2
• 单位淮阴师范学院; 南京理工大学