Method of fabricating a near-net shaped zirconium diboride -silicon carbide composite conical nosecone by hot pressing useful in ultra high-temperature hypersonic aerospace, involves loading powder mixture into graphite die using graphite foil, putting graphite spacer on powder
	PRASAD N E; MISHRA R; KUMAR A; MISRA M K; KUMAR S
	2023-08-08
专利权人	DEFENCE RES & DEV ORG (INIA-C)
申请日期	2023-08-08
专利号	IN202311053188-A
成果简介	NOVELTY - Method of fabricating a near-net shaped zirconium diboride -silicon carbide (ZrB2-SiC) composite conical nosecone by hot pressing, involves ball milling of a mixture of ZrB2and SiC powder in a ratio of 80:20 using tungsten carbide balls for 24 hours (h); drying the slurry in a rotating evaporator at 80 °C and ball milling the dried slurry; loading the powder mixture into a graphite die using graphite foil, putting a graphite spacer on the powder, and covering the graphite die with a graphite top lid; applying an axial load to the powder to obtain pressure up to 30 Mega Pascal (MPa) while heating up the powder to 2100 °C under a vacuum of 10-5 millibars (mbar) at a controlled heating rate of 10 °C/minutes (min); cooling the furnace at a controlled rate of 2-5 °C/min to reach room temperature; and removing the assembled part and nosecone from the graphite die and obtaining a final shape ZrB2-SiC composite nosecone. USE - Method of fabricating a near-net shaped zirconium diboride -silicon carbide composite conical nosecone by hot pressing useful in ultra high-temperature hypersonic aerospace. ADVANTAGE - The ZrB2-SiC composite that exhibits bending strength between 350-400 MPa and compressive strength 900-1000 MPa. The density of composite is 96-97% by theoretical. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for A zirconium diboride -silicon carbide (ZrB2-SiC) composite-based vacuum hot pressed nose cone.
IPC 分类号	C04B-033/32 ; C04B-035/58 ; C04B-035/593 ; C04B-035/645 ; H05K-001/02
国家	印度
专业领域	材料科学
语种	英语
成果类型	专利
文献类型	科技成果
条目标识符	http://119.78.100.226:8889/handle/3KE4DYBR/20918
专题	中国科学院新疆生态与地理研究所
作者单位	DEFENCE RES & DEV ORG (INIA-C)
推荐引用方式 GB/T 7714	PRASAD N E,MISHRA R,KUMAR A,et al. Method of fabricating a near-net shaped zirconium diboride -silicon carbide composite conical nosecone by hot pressing useful in ultra high-temperature hypersonic aerospace, involves loading powder mixture into graphite die using graphite foil, putting graphite spacer on powder. IN202311053188-A[P]. 2023.

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