Fabrication of Ultra-Fine-Grained W-TiC Alloys by a Simple Ball-Milling and Hydrogen Reduction Method

Autor:	Shaoting Lang, Ningbo Sun, shusen Hou, Weixin Yu, Junhui Cao, Zhijun Yang
Rok vydání:	2021
Předmět:	Technology Materials science Alloy Spark plasma sintering chemistry.chemical_element ball-milling method mechanical properties Tungsten engineering.material Indentation hardness Article core-shell structure General Materials Science Composite material Ball mill Microscopy QC120-168.85 QH201-278.5 W-TiC alloys Engineering (General). Civil engineering (General) Microstructure TK1-9971 Descriptive and experimental mechanics chemistry microstructures engineering Particle Grain boundary Electrical engineering. Electronics. Nuclear engineering TA1-2040
Zdroj:	Materials, Vol 14, Iss 5865, p 5865 (2021) Materials Volume 14 Issue 19
ISSN:	1996-1944
DOI:	10.3390/ma14195865
Popis:	In this paper, a simple method to fulfill the ideal microstructural design of particle reinforced tungsten (W) alloys with promising mechanical properties is presented. W-0.5 wt.% TiC powders with core-shell (TiC/W) structure are prepared by ball-milling and controlled hydrogen reduction processes. TEM observation demonstrates that the nano TiC particles are well coated by tungsten. The W-TiC powders are sintered by spark plasma sintering (SPS) under 1600 °C. The sintered microstructures are characterized by FESEM and TEM. It is found that the W-0.5TiC alloys obtain an ultra-fine-sized tungsten grain of approximately 0.7 μm. The TiC particles with the original nano sizes are uniformly distributed both in tungsten grain interiors and at tungsten grain boundaries with a high number density. No large agglomerates of TiC particles are detected in the microstructure. The average diameter of the TiC particles in the tungsten matrix is approximately 47.1 nm. The mechanical tests of W-0.5 TiC alloy show a significantly high microhardness and bending fracture strength of 785 Hv0.2 and 1132.7 MPa, respectively, which are higher than the values obtained in previous works. These results indicate that the methods used in our work are very promising to fabricate particle-dispersion-strengthened tungsten-based alloys with high performances.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6a0301c7afa406d976107d3bf7549122 https://doi.org/10.3390/ma14195865 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
Nepřihlášeným uživatelům se plný text nezobrazuje	K zobrazení výsledku je třeba se přihlásit.