Freestanding titanium metallic aerogel. (5th May 2016)

• Record Type: Journal Article
• Authors: Xu, Weiwei; Du, Ai; Xiong, Jun; Zhang, Zhihua; Shen, Jun; Zhou, Bin
• Is Part Of: Materials & design. Volume 97(2016)
• Page Start: 93
• Page End: 97
• Publication Date: 2016-05-05
• Subjects: Nanoporous titanium -- Magnesiothermic reduction -- Self-supporting monolith -- Voluminal heating -- Radiography; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2016.02.070
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: Nanoporous titanium was prepared by an in-situ template confined synthetic strategy involving the magnesiothermic reduction on TiO2 aerogel template at relative low temperature and hydrochloric acid etching process. The resulting self-supporting monolith with α titanium as the major phase retained the similar morphology of initial template and exhibited a high specific surface area about 99.1 m 2 /g. In addition, as the ideal laser-irradiated target material for production of multi-keV X-rays, the titanium aerogel has successfully realized the voluminal heating when irradiated by the high-energy laser pulse on the Shenguang-II facility, and the Ti K-shell emitted X-ray spectrum ranging from 3 to 9 keV was detected using X-ray elliptical crystal spectrometer. More importantly, the result could provide significant reference for further research about the application of metal aerogel target in the field of the multi-keV X-ray sources, which was essential for radiography of inertial-confinement-fusion (ICF) experiments. Graphical abstract: Highlights: The magnesiothermic reduction method was used to prepare the self-assembling monolithic titanium aerogel. The resulting titanium aerogel retained the similar morphology of TiO2 template. The titanium aerogel target has successfully realized the voluminal heating when irradiated by the high-energy laser. Low density and homogeneous microstructure of Ti aerogel target could significantly improve the conversion efficiency.