Next Article in Journal
Color Stability and Micro-Hardness of Bulk-Fill Composite Materials after Exposure to Common Beverages
Previous Article in Journal
Antimicrobial Nanostructured Coatings: A Gas Phase Deposition and Magnetron Sputtering Perspective
Previous Article in Special Issue
Preparation of Black Ceramic Tiles Using Waste Copper Slag and Stainless Steel Slag of Electric Arc Furnace
Open AccessArticle

Low Temperature Synthesis of Phase Pure MoAlB Powder in Molten NaCl

College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter EX4 4QF, UK
College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
Henan Key Laboratory of High Temperature Functional Ceramics, Zhengzhou University, Zhengzhou 450052, China
College of Civil Engineering and Architecture, Quzhou University, Quzhou 32400, Zhejiang, China
Authors to whom correspondence should be addressed.
Materials 2020, 13(3), 785;
Received: 2 December 2019 / Revised: 5 February 2020 / Accepted: 6 February 2020 / Published: 9 February 2020
(This article belongs to the Special Issue High Temperature Ceramic Materials)
MoAlB fine powders were prepared in molten NaCl from Al, B and Mo powders. The effects of key parameters affecting the synthesis process and phase morphology were examined and the underpinning mechanisms proposed. MoAlB product particles exhibited different shapes/sizes, as follows: spherical grains (1~3 μm), plate-like particles (<5 μm in diameter) and columnar crystals with lengths up to 20 μm and diameters up to 5 μm, resultant from different reaction processes. Phase pure MoAlB was synthesised under the following optimal conditions: use of 140% excess Al and 6 h of firing at 1000 °C. This temperature was at least 100 °C lower than required by other methods/techniques previously reported. At the synthesis condition, Mo first reacted with Al and B, forming Al8Mo3 and MoB, respectively, which further reacted with excess Al to form Al-rich Al–Mo phases and MoAlB. The Al-rich Al–Mo phases further reacted with the residual B, forming additional MoAlB. The molten NaCl played an important role in accelerating the overall synthesis process. View Full-Text
Keywords: MoAlB; molten salt synthesis; low temperature; NaCl; boron MoAlB; molten salt synthesis; low temperature; NaCl; boron
Show Figures

Figure 1

MDPI and ACS Style

Liu, C.; Hou, Z.; Jia, Q.; Liu, X.; Zhang, S. Low Temperature Synthesis of Phase Pure MoAlB Powder in Molten NaCl. Materials 2020, 13, 785.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop