A method of sintering a binderless cBN body includes providing a boron nitride particle mixture into a pressure chamber, the boron nitride particle mixture having a first type of boron nitride particles and boron nitride filler particles, and the boron nitride filler particles having a different size and/or type than the first type of boron nitride particles, and sintering the boron nitride particle mixture in the pressure chamber to form the cBN body by generating a pressure in the pressure chamber of less than 7.7 GPa and heating the boron nitride particle mixture to a temperature ranging from about 1900° C. to about 2300° C., wherein the cBN body has a density of at least 97 percent.

Provided are formed bodies comprising hexagonal boron nitride wherein the formed body has a Brinell hardness of at least 2 HBW 2,5/2, and wherein the formed body is obtainable by a process at temperatures of at most 100 C., and wherein the Brinell hardness is measured according to DIN EN ISO 6506-1 (2013). Further provided are processes for making said formed body.

A material powder for additive modeling including a nitride, and a eutectic oxide, the nitride having an average density lower than an average density of the eutectic oxide, is used to produce a structure using an additive modeling method.