In the present study, the structure and porosity of binary Ti-35Zr (wt.%) alloy were investigated, allowing to consider powder metallurgy as a production method for new metallic materials for potential medical applications. The porous Ti-Zr alloys were obtained by milling, cold isostatic pressing and sintering. The pressure during cold isostatic pressing was a changing parameter and was respectively 250, 500, 750 and 1000 MPa. The X-ray diffraction study revealed only the α phase, which corresponds to the Ti-Zr phase diagram. The microstructure of the Ti-35Zr was observed by optical microscopy and scanning electron microscopy. These observations revealed that the volume fraction of the pores decreased from over 20% to about 7% with increasing pressure during the cold isostatic pressing. The microhardness measurements showed changes from 137 HV0.5 to 225 HV0.5.
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http://dx.doi.org/10.3390/ma13204539 | DOI Listing |
Int J Biol Macromol
December 2024
College of Art and Science, Northeast Agr Univ, Harbin 150030, China. Electronic address:
Synthesis of microbial fuel cell (MFC) cathode catalysts using corn straw with natural multi-channel structure is an useful measure for developing sustainable energy sources and making creative use of agricultural waste. The catalytic performance of nanomaterial catalysts in the oxygen reduction reaction (ORR) is clearly influenced by porosity and channel structure. Mesopores usually contribute to the enhancement of reaction kinetics and mass transfer.
View Article and Find Full Text PDFDent Mater
December 2024
Department of Preventive and Restorative Sciences, School of Dental Medicine, University of Pennsylvania, PA 19104, USA. Electronic address:
Objectives: This study aimed to elucidate the effect of various two-step sintering (TSS) protocols on the physical, mechanical, and optical properties of partially stabilized zirconia with different yttria dopant concentrations (Y-PSZ).
Methods: Disc-shaped specimens were obtained from most widely used commercial dental zirconia powders of various Y contents (Tosoh Corp.) by uniaxial pressing followed by cold-isostatic pressing.
Adv Biol (Weinh)
November 2024
Brio Life Science, Inc., 503, 1-26-12, Takadano-baba, Shinjyuku-ku, Tokyo, 169-0075, Japan.
Decellularized tissues retain the extracellular matrix (ECM), shape, and composition that are unique to the source tissue. Previous studies using decellularized tissue lysates and powders have shown that tissue-specific ECM plays a key role in cellular function and wound healing. However, creating decellularized tissues composed of tissue-specific ECM with customizable shapes and structures for use as scaffolding materials remains challenging.
View Article and Find Full Text PDFInt J Biol Macromol
December 2024
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China.
In this experiment, polyphenolic substances were extracted from Camellia sinensis seeds (CSS) using a synergistic treatment of cold isostatic pressure (CIP) and cellulase. The effects of pressure, treatment time, and cellulase addition on the experiment were investigated. And the optimal extraction conditions were established by single factor experiment and Box-benhken experiments: the pressure applied by CIP was 408.
View Article and Find Full Text PDFAdv Mater
November 2024
Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China.
Considering the large demand for electricity in the era of artificial intelligence and big data, there is an urgent need to explore novel energy storage media with higher energy density and intelligent temperature self-check functions. High-entropy (HE) ceramic capacitors are of great significance because of their excellent energy storage efficiency and high power density (P). However, the contradiction between configurational entropy and polarization in traditional HE systems greatly restrains the increase in energy storage density.
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