US 11,807,580 B2
High strength ceramics with novel fracture mode
Michael Hunt, Alexandria, VA (US); Guillermo R. Villalobos, Springfield, VA (US); Benjamin Rock, Rockville, MD (US); Shyam S. Bayya, Ashburn, VA (US); Woohong Kim, Washington, DC (US); Ishwar D. Aggarwal, Waxhaw, NC (US); Bryan Sadowski, Falls Church, VA (US); and Jasbinder S. Sanghera, Ashburn, VA (US)
Assigned to The Government of the United States of America, as represented by the Secretary of the Navy, Arlington, VA (US)
Filed by The Government of the United States of America, as represented by the Secretary of the Navy, Arlington, VA (US)
Filed on Apr. 8, 2022, as Appl. No. 17/716,085.
Application 17/716,085 is a division of application No. 15/498,709, filed on Apr. 27, 2017, granted, now 11,299,428.
Claims priority of provisional application 62/328,319, filed on Apr. 27, 2016.
Prior Publication US 2022/0227675 A1, Jul. 21, 2022
Int. Cl. C04B 35/505 (2006.01); C04B 35/443 (2006.01); C04B 35/50 (2006.01); C04B 35/46 (2006.01); C04B 35/64 (2006.01); C04B 35/638 (2006.01); C04B 35/468 (2006.01)
CPC C04B 35/505 (2013.01) [C04B 35/443 (2013.01); C04B 35/4682 (2013.01); C04B 35/50 (2013.01); C04B 35/638 (2013.01); C04B 35/64 (2013.01); C04B 2235/3208 (2013.01); C04B 2235/3215 (2013.01); C04B 2235/3222 (2013.01); C04B 2235/3224 (2013.01); C04B 2235/3225 (2013.01); C04B 2235/3236 (2013.01); C04B 2235/5409 (2013.01); C04B 2235/5445 (2013.01); C04B 2235/604 (2013.01); C04B 2235/608 (2013.01); C04B 2235/6025 (2013.01); C04B 2235/6027 (2013.01); C04B 2235/6562 (2013.01); C04B 2235/6567 (2013.01); C04B 2235/667 (2013.01); C04B 2235/77 (2013.01); C04B 2235/786 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method for making a ceramic having transgranular fracture behavior, comprising: forming a green body comprising lutetium oxide powder; densifying the green body using microwaves to heat the green body at a rate of 100° C./min to 1500° C. and then holding at 1500° C. for 15 minutes, wherein the microwave frequency is greater than 30 GHz, wherein a ceramic is formed, and wherein there are dislocations within the ceramic; and cooling the ceramic to room temperature to trap the dislocations in the ceramic, resulting in a ceramic having a transgranular fracture mode.