Yttrium oxide-tungsten continuous graded material as well as preparation method thereof and application thereof

• Main Authors: CHEN LEI, WANG SHIYANG, JIA DECHANG, WANG YUJIN, ZHOU YU
• Format: Patent
• Language: Chinese; English
• Published: 15.02.2017
• Subjects: BLASTING; CASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; FURNACES; FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; KILNS; LIGHTING; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MECHANICAL ENGINEERING; OPEN SINTERING OR LIKE APPARATUS; OVENS; PERFORMING OPERATIONS; POWDER METALLURGY; RETORTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; WEAPONS; WORKING METALLIC POWDER

The invention relates to an yttrium oxide-tungsten continuous graded material as well as a preparation method thereof and application thereof. The graded material comprises a tungsten layer with thickness being l0, an yttrium oxide layer with thickness being l1 and a transition layer with a tungsten-rich surface and a yttrium oxide-rich surface and thickness being l2, wherein 10 and l1 are independently greater than or equal to 0, and l2 is greater than 0; volume fraction of yttrium oxide at a position z from a tungsten surface in the transition layer is FORMULA as shown in the specification, and volume fraction of tungsten is FORMULA as shown in the specification; l is equal to l0+l2, p is greater than or equal to 0.1, and smaller than or equal to 2.0, and z is greater than or equal to l0 and smaller than or equal to l. The preparation method for the yttrium oxide-tungsten continuous graded material preferably adopts a free settling mode for combining a cold-press molding process with a sintering process to