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Ceramic Aluminum Nitride vs. Plastic PLA

Compare Ceramic Aluminum Nitride vs. Plastic PLA strength, stiffness, weight and thermal properties.

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Ceramic Aluminum NitrideSintered ceramic (pressed and fired)
Plastic PLA3D printed (FDM)
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Mechanical
Yield strengthnot sourced52.5MPasourcetypical
Ultimate tensile strengthnot sourced52.5MPasourcetypical, peak stress (= stress at yield)
Flexural strength310MPasource3-point bending strength (JIS R 1601)96.8MPasourcetypical
Elongation at breaknot sourced7.8%sourcetypical
Young's modulus (stiffness)320GPasourcetypical (JIS R 1602)3.25GPasourcetypical
Density3,400kg/m³sourcetypical (JIS R 1634)1,240kg/m³sourcetypical
Strength to weightnot sourced42.3kN·m/kg
Stiffness to weight94.1MN·m/kg35.9x higher2.62MN·m/kg
Poisson's ratio0.24sourcetypical (JIS R 1602)not sourced
Shear modulus129GPanot sourced
Bulk modulus205GPanot sourced
Speed of sound9,701m/s1,619m/s
Thermal
Thermal conductivity150W/m·Ksourcetypical (JIS R 1611)0.13W/m·Ksourcebase material: NatureWorks Ingeo biopolymer, amorphous sheet, 25 °C
Thermal expansion4.6µm/m·Ksourcemean, 40-400 °C (JIS R 1618)not sourced
100 mm part over a 50 °C swing23µm growthnot sourced
Specific heat710J/kg·Ksourcetypical (JIS R 1611)1,200J/kg·Ksourcebase material: NatureWorks Ingeo biopolymer, amorphous sheet, 25 °C
Heats up and cools (diffusivity)62.1mm²/s711x faster0.0874mm²/s
Thermal shock resistancenot sourcednot sourced
Melting pointnot sourced152°Csourcetypical
Glass transitionnot sourced59.1°Csourcetypical
Max service temperaturenot sourced58.8°CsourceHDT 0.455 MPa (printed specimens)
Values forKYOCERA AN216A dense sintered aluminium nitride, typical values; KYOCERA Fineceramics Europe data sheet 2023.04.03Ultimaker PLA, 3D-printed specimens, XY (flat) orientation; Ultimaker S5 Pro, engineering intent profile, 0.15 mm layer height, AA 0.4 print core, 100% infill, Cura 4.9, printed one-at-a-time, conditioned >=24 h at room temperature. TDS dated April 20, 2022.

Every value links to the document that states it. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.

Plastic PLA is 3D printed: its properties depend on build direction and print settings; these are typical values.

Questions

Which is lighter, Ceramic Aluminum Nitride or Plastic PLA?

Plastic PLA is lighter: 1,240 kg/m³ against 3,400 kg/m³ for Ceramic Aluminum Nitride.

Which is stiffer, Ceramic Aluminum Nitride or Plastic PLA?

Ceramic Aluminum Nitride is stiffer: Young's modulus 320 GPa against 3.25 GPa for Plastic PLA, so the same part in Ceramic Aluminum Nitride deflects less under the same load.

Which is lighter for the same job, Ceramic Aluminum Nitride or Plastic PLA?

For the same stiffness or strength: Ceramic Aluminum Nitride is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate.

Part that must beCeramic Aluminum NitridePlastic PLA
Stiff rod or tie (tension)lighter35.9x heavier
Stiff beam (bending)lighter3.62x heavier
Stiff panel or platelighter1.68x heavier

For the same stiffness or strength, mass scales with density over stiffness (or strength) raised to a power set by how the part is loaded: 1 for a rod in tension, 1/2 for a beam in bending, 1/3 for a panel (the standard material-selection indices).

Which conducts heat better, Ceramic Aluminum Nitride or Plastic PLA?

Ceramic Aluminum Nitride conducts heat better: 150 W/m·K against 0.13 W/m·K for Plastic PLA.

Among 72 materials

1k10k0.1110100Density (kg/m³)Young's modulus (GPa)Plastic PETGPlastic ABSPlastic TPUPlastic NylonAluminumSteelIronTitaniumSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless Steel 303Stainless Steel 17-4PHAluminum 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VBrass C260Nickel Inconel 718Magnesium AZ31B-H24Zinc Zamak 3Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic UHMWPEPlastic HDPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM PAHT-CFFDM HIPSSLA Resin Tough 2000SLS PA12 NylonDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelPCB Laminate FR-4SiliconCeramic Alumina 96%Aluminum A380Aluminum 6063-T6Aluminum 1100-OAluminum ADC12Magnesium AZ91DSolder SAC305Plastic PBT GF30Plastic PPS GF40Plastic LCP GF30Ceramic Aluminum NitridePlastic PLA
Stiffness against density
1k10k101001kDensity (kg/m³)Yield strength (MPa)Plastic PETGPlastic ABSPlastic TPUPlastic NylonRubberAluminumSteelIronTitaniumSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless Steel 303Stainless Steel 17-4PHAluminum 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VBrass C260Nickel Inconel 718Magnesium AZ31B-H24Zinc Zamak 3Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic PTFEPlastic UHMWPEPlastic HDPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM PAHT-CFFDM HIPSSLA Resin Tough 2000SLA Resin Elastic 50ASLS PA12 NylonDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelBrickPCB Laminate FR-4SiliconCeramic Alumina 96%Aluminum A380Aluminum 6063-T6Aluminum 1100-OAluminum ADC12Magnesium AZ91DSolder SAC305Plastic PBT GF30Plastic PPS GF40Plastic LCP GF30Plastic PLA
Strength against density

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