Various embodiments provide a mold including a pyrolytic carbon film disposed at a surface of the mold. Various embodiments relate to using a low pressure chemical vapor deposition process (LPCVD) or using a physical vapor deposition (PVD) process in order to form a pyrolytic carbon film at a surface of a mold.

A powder useful for making a mold utilized for shaping glass-based materials includes at least about 50% by weight nickel. Metal oxides that are not miscible with nickel may be dispersed within the powder in an amount in a range from about 0.2 to about 15% by volume. A mold made from the powder may have a mold body having a composition comprising at least 50% by weight nickel and a metal oxide that is not miscible with nickel in an amount in a range from about 0.2 to about 15% by volume, a nickel oxide layer on a surface of the mold body wherein the nickel oxide layer has first and second opposing surfaces, the first surface of the nickel oxide layer contacts and faces the surface of the mold body, the second surface of the nickel oxide layer includes a plurality of grains, and the plurality of grains has an average grain size of about 100 m or less.

A powder useful for making a mold utilized for shaping glass-based materials includes at least about 50% by weight nickel. Metal oxides that are not miscible with nickel may be dispersed within the powder in an amount in a range from about 0.2 to about 15% by volume. A mold made from the powder may have a mold body having a composition comprising at least 50% by weight nickel and a metal oxide that is not miscible with nickel in an amount in a range from about 0.2 to about 15% by volume, a nickel oxide layer on a surface of the mold body wherein the nickel oxide layer has first and second opposing surfaces, the first surface of the nickel oxide layer contacts and faces the surface of the mold body, the second surface of the nickel oxide layer includes a plurality of grains, and the plurality of grains has an average grain size of about 100 m or less.

An apparatus for forming 3D glass for a smart phone, including a lower mold set including a first lower mold 52A and a first upper mold 50A having a cavity in which curved glass is formed between the first lower mold and the first upper mold when the first lower mold and the first upper mold are coupled, an upper mold set including a second lower mold 52B and a second upper mold 50B having a cavity in which curved glass is formed between the second lower mold and the second upper mold when the second lower mold and the second upper mold are coupled, and a plurality of support pins 60 supporting the upper mold set in the state in which the upper mold set has been spaced apart from the lower mold set at a specific interval.