Ceramic Fundamentals

Ceramic

A class of inorganic, nonmetallic material represented in this source by stable oxide, carbide, and nitride material systems.

Engineering Ceramic

A ceramic material engineered for useful technical or functional applications rather than primarily decorative uses.

Technical Ceramic

An engineered ceramic intended for technical applications; in this context, technical ceramics are challenging materials to manufacture additively at full density.

Major Ceramic Material Systems in AM

Oxides, carbides, and nitrides.

Oxide Ceramic

A ceramic material system based on compounds containing oxygen; stable oxide ceramics are one of the major ceramic categories used in additive manufacturing.

Carbide Ceramic

A ceramic material system based on compounds containing carbon combined with another element; carbides are one of the major ceramic categories used in additive manufacturing.

Nitride Ceramic

A ceramic material system based on compounds containing nitrogen combined with another element; nitrides are one of the major ceramic categories used in additive manufacturing.

Stable Ceramic Compounds

The source describes the ceramics considered for AM as generally stable oxides, carbides, and nitrides.

Ceramic Feedstock

The ceramic-containing starting material supplied to an additive-manufacturing process.

Ceramic Powder

A particulate ceramic feedstock used as the starting material in powder-based ceramic manufacturing processes.

Why are ceramic powder feedstocks widely available?

Conventional ceramic processing already makes extensive use of powders, so powder feedstocks are widely available for ceramic manufacturing.

Conventional Ceramic Processing and AM Feedstocks

Because conventional ceramic processing uses powders, additive manufacturing can draw upon an already widely available class of ceramic feedstocks.

Ceramic Additive Manufacturing

The use of additive-manufacturing processes to shape ceramic-containing feedstocks into ceramic components.

Development Status of Ceramic AM

The source describes ceramics as one of the most challenging and least widely developed categories of engineered additive-manufacturing materials.

Why is ceramic AM significant despite its challenges?

Ceramics are important engineering materials, but producing fully densified technical ceramic components through AM remains challenging.

Fully Densified Technical Ceramic

A technical ceramic processed to achieve essentially complete densification rather than retaining substantial internal porosity.

Fully Densified Ceramic AM Challenge

Producing fully densified technical ceramics remains a significant challenge for additive manufacturing.

Most Common Ceramic AM Processes

The source identifies binder jetting (BJP) and material jetting (MJ) as the most common ceramic AM processes.

Binder Jetting for Ceramics (BJP)

A ceramic additive-manufacturing approach identified by the source as one of the most common processes used with ceramics.

Material Jetting for Ceramics (MJ)

A ceramic additive-manufacturing approach identified by the source as one of the most common processes used with ceramics.

Vat Photopolymerization for Ceramics (VP)

A ceramic additive-manufacturing approach that the source describes as becoming available for ceramic processing.

Ceramic AM Flammability

The source states that flammability concerns are minimal because the ceramics considered are generally stable oxides, carbides, and nitrides.

Why are flammability concerns generally minimal for the ceramics described?

They are generally stable oxide, carbide, and nitride materials.

Ceramic Powder Inhalation Hazard

Although ceramic flammability concerns are minimal, inhalation safety must still be considered when handling ceramic powders.

Why does ceramic powder still require safety precautions?

Fine ceramic material can present an inhalation concern even when the material itself has minimal flammability risk.

Ceramic Feedstock Safety

The handling of ceramic feedstocks requires attention particularly to inhalation exposure, even though flammability is generally a lesser concern for the stable ceramics described.

Ceramic AM Material Challenge

Availability of ceramic powders does not eliminate the difficulty of converting those feedstocks into fully densified technical ceramic components.

Feedstock Availability vs. Manufacturability

Ceramic powder may be readily available because powders are already common in conventional ceramic processing, while successful additive manufacture and full densification can still remain difficult.

Central Materials Lesson of Ceramic AM

A material can have readily available feedstock while still presenting substantial challenges in processing it into a fully densified engineering component.