An adaptive surface texturing method is provided for use with a part formed of ceramic matrix composites (CMCs) to be coated with an environmental barrier coating (EBC). The method includes coating a CMC surface of the part with an initial coating, determining a contour and an undulation pattern of the CMC surface and designing a texturing pattern to follow the contour and the undulation pattern and to be formed in the initial coating based on a thickness of the initial coating and an average particle size of a slurry of the EBC.

A rare earth aluminate sintered compact including rare earth aluminate phosphor crystalline phases and voids, wherein an absolute maximum length of 90% or more by number of rare earth aluminate phosphor crystalline phases is in a range from 0.4 m to 1.3 m, and an absolute maximum length of 90% or more by number of voids is in a range from 0.1 m to 1.2 m.

A method for manufacturing a ceramic ball material according to an embodiment, includes: a step of producing a ceramic green compact; a step of performing a plurality of times of a CIP process on the ceramic green compact to produce a CIP (cold isostatic pressing) green compact; and a step of sintering a CIP green compact produced by a final CIP process among the plurality of times of the CIP process to produce a ceramic sintered compact. In the step of producing the CIP green compact, after a former CIP process among the plurality of times of the CIP process is performed, an orientation of a CIP green compact produced by the former CIP process is changed, and a latter CIP process is performed.

A batch of refractory objects may include a plurality of bodies including a ceramic material. The batch may include an average porosity of at least 25% to not greater than 75% for the volume of the batch. The batch may have at least 50 refractory objects, a minimum volume of at least 0.36 cubic meters, and an average batch Porosity Index of not greater than 7.