ASTM Proposes First Design Framework for 3D Printed Ceramics

Why Ceramic AM Needs Its Own Design Rules

Ceramics are the high-performance material nobody can agree on how to design for. They handle extreme heat, resist chemicals, stay electrically insulating, and remain light. But they also shrink during sintering, crack if you look at them wrong, and behave nothing like metals or plastics when you try to print them.

ASTM International's additive manufacturing committee, F42, has put forward a proposal to change that. The working title is WK84355: New Guide for Additive Manufacturing - Design - Parts using ceramic materials. If approved, it would become the first standard specifically for designing 3D printed ceramic parts.

What the Proposal Actually Covers

The guide does not try to standardize the printers themselves. Instead, it sets rules for the design phase: how to account for sintering shrinkage, how to avoid embrittlement in the final part, and how to structure geometries so they survive post-processing.

Brandon Cox, lead engineer at Electron Optics Lab and an ASTM member, put it plainly: ceramics are useful for their strength, heat resistance, hardness, chemical inertness, and electrical insulation. But they are brittle, and they shrink during final sintering. This guide would help customers and regulators evaluate whether AM ceramic parts were designed properly based on the technical demands of the application.

Who This Affects

The proposal is aimed at designers and developers in industry and research. ASTM notes that the AM ceramics market has been growing fast since 2010 and is now reaching general market adoption. The problem is that existing ceramic design rules do not address additive manufacturing processes. AM lets engineers integrate multiple functions into a single part, making parts lighter and more durable than traditional methods, but only if the design accounts for the specific behavior of the AM process.

The guide would also help regulators and customers verify that parts were designed correctly before they are built, rather than discovering defects after sintering.

The Timing

Ceramic AM is moving from niche prototyping to aerospace, medical, and semiconductor tooling. Recent months have seen multiple ceramic-focused announcements, from Sinto's ISO 9001 certification for technical ceramics to new binder jetting systems targeting aerospace components. A design standard would give buyers and quality teams a common reference point for the first time.

ASTM's proposal is now open for comment through its committee process. If it moves to a full standard, WK84355 would likely become a baseline specification referenced in procurement documents and quality audits for ceramic AM parts.