Material passport. Surphysis

Sapphire, c-plane

Al2O3

ceramic, trigonal, R-3c, c-axis normal, 3 980 kg / m3. Single crystal. CTE disputed between 5.0 and 7.0 x 1e-6 / K in house sources.

MP-sapphire-c
4 rows, 4 quality C, 0 measured in house

Quantity	Value	Sigma	Form, T window	Method	Source	Quality
Young's modulus c-axispreferred	435 GPa	12 GPa	single_crystal, 293 to 1600 K	placeholder	TO VERIFY	C, to verify
Poisson ratio c-axispreferred	0.25	0.02	single_crystal, room T	placeholder	TO VERIFY	C, to verify
linear CTE c-axispreferred	7 x 1e-6 / K	1 x 1e-6 / K	single_crystal, 293 to 1573 K	placeholder, disputed 5.0 to 7.0	TO VERIFY	C, to verify
allowable stress for the criterion c-axispreferred	800 MPa	200 MPa	single_crystal, room T	placeholder, allowable stress	TO VERIFY	C, to verify

Interfaces

Pair	Quantity	Value	Sigma	Method	Quality
Molybdenum / Sapphire, c-plane	G_c	8.5 J / m2	3.5	placeholder, Paper 3 wedge test pending	C, to verify

Alumina, sintered

Al2O3

ceramic, trigonal, R-3c, polycrystal, 3 950 kg / m3. 99.5 % grade placeholder.

MP-alumina
4 rows, 4 quality C, 0 measured in house

Quantity	Value	Sigma	Form, T window	Method	Source	Quality
Young's moduluspreferred	380 GPa	15 GPa	polycrystal, 293 to 1273 K	placeholder	TO VERIFY	C, to verify
Poisson ratiopreferred	0.22	0.02	polycrystal, room T	placeholder	TO VERIFY	C, to verify
linear CTEpreferred	8.1 x 1e-6 / K	0.3 x 1e-6 / K	polycrystal, 293 to 1273 K	placeholder	TO VERIFY	C, to verify
allowable stress for the criterionpreferred	350 MPa	50 MPa	polycrystal, room T	placeholder, flexural strength	TO VERIFY	C, to verify

Interfaces

Pair	Quantity	Value	Sigma	Method	Quality
Alumina, sintered / Nickel	G_c	8 J / m2	3	placeholder, four-point bend	C, to verify
Alumina, sintered / Nickel	psi	45°	0.1	placeholder, mode mixity at G_c, rad	C, to verify

Yttria-stabilised zirconia, 7 wt% Y2O3

ZrO2 7 wt% Y2O3

ceramic, tetragonal prime, EB-PVD columnar, 6 000 kg / m3. Top coat placeholder.

MP-ysz
3 rows, 3 quality C, 0 measured in house

Quantity	Value	Sigma	Form, T window	Method	Source	Quality
Young's modulus in-planepreferred	40 GPa	15 GPa	thin_film, 293 to 1473 K	placeholder, columnar as deposited	TO VERIFY	C, to verify
Poisson ratiopreferred	0.22	0.03	thin_film, room T	placeholder	TO VERIFY	C, to verify
linear CTEpreferred	10.7 x 1e-6 / K	0.4 x 1e-6 / K	thin_film, 293 to 1473 K	placeholder	TO VERIFY	C, to verify

Interfaces

Pair	Quantity	Value	Sigma	Method	Quality
Inconel 718 / Yttria-stabilised zirconia, 7 wt% Y2O3	G_c	20 J / m2	8	placeholder, stands in for YSZ on bond coat	C, to verify

Silicon nitride, sintered

Si3N4

nitride, hexagonal beta, 3 200 kg / m3.

MP-si3n4
4 rows, 4 quality C, 0 measured in house

Quantity	Value	Sigma	Form, T window	Method	Source	Quality
Young's moduluspreferred	310 GPa	10 GPa	polycrystal, 293 to 1273 K	placeholder	TO VERIFY	C, to verify
Poisson ratiopreferred	0.27	0.02	polycrystal, room T	placeholder	TO VERIFY	C, to verify
linear CTEpreferred	3.3 x 1e-6 / K	0.2 x 1e-6 / K	polycrystal, 293 to 1273 K	placeholder	TO VERIFY	C, to verify
allowable stress for the criterionpreferred	700 MPa	100 MPa	polycrystal, room T	placeholder, flexural strength	TO VERIFY	C, to verify

Interfaces

Pair	Quantity	Value	Sigma	Method	Quality
Stainless steel 316L / Silicon nitride, sintered	G_c	25 J / m2	10	placeholder, active braze joint	C, to verify

Inconel 718

Ni-19Cr-18Fe-5Nb-3Mo-1Ti-0.5Al

alloy, fcc gamma with gamma double prime, 8 190 kg / m3. AM_as_built form seeded for LPBF.

MP-in718
4 rows, 4 quality C, 0 measured in house

Quantity	Value	Sigma	Form, T window	Method	Source	Quality
Young's moduluspreferred	205 GPa	8 GPa	AM_as_built, 293 to 923 K	placeholder	TO VERIFY	C, to verify
Poisson ratiopreferred	0.3	0.01	AM_as_built, room T	placeholder	TO VERIFY	C, to verify
linear CTEpreferred	15.3 x 1e-6 / K	0.5 x 1e-6 / K	AM_as_built, 293 to 973 K	placeholder, secant 20 to 700 C	TO VERIFY	C, to verify
yield strengthpreferred	1 030 MPa	60 MPa	AM_as_built, 293 to 293 K	placeholder	TO VERIFY	C, to verify

Interfaces

Pair	Quantity	Value	Sigma	Method	Quality
Inconel 718 / Yttria-stabilised zirconia, 7 wt% Y2O3	G_c	20 J / m2	8	placeholder, stands in for YSZ on bond coat	C, to verify

Stainless steel 316L

Fe-17Cr-12Ni-2.5Mo

alloy, fcc austenite, 7 990 kg / m3. Hydrogen barrier substrate placeholder.

MP-316l
4 rows, 4 quality C, 0 measured in house

Quantity	Value	Sigma	Form, T window	Method	Source	Quality
Young's moduluspreferred	193 GPa	5 GPa	bulk, 293 to 773 K	placeholder	TO VERIFY	C, to verify
Poisson ratiopreferred	0.27	0.01	bulk, room T	placeholder	TO VERIFY	C, to verify
linear CTEpreferred	16 x 1e-6 / K	0.4 x 1e-6 / K	bulk, 293 to 773 K	placeholder	TO VERIFY	C, to verify
yield strengthpreferred	205 MPa	20 MPa	bulk, 293 to 293 K	placeholder	TO VERIFY	C, to verify

Interfaces

Pair	Quantity	Value	Sigma	Method	Quality
Stainless steel 316L / Silicon nitride, sintered	G_c	25 J / m2	10	placeholder, active braze joint	C, to verify

Molybdenum

Mo

metal, bcc, Im-3m, 10 280 kg / m3. Sputtered thin film form seeded.

MP-mo
4 rows, 4 quality C, 0 measured in house

Quantity	Value	Sigma	Form, T window	Method	Source	Quality
Young's modulus in-planepreferred	329 GPa	10 GPa	thin_film, 293 to 1273 K	placeholder	TO VERIFY	C, to verify
Poisson ratiopreferred	0.31	0.01	thin_film, room T	placeholder	TO VERIFY	C, to verify
linear CTEpreferred	5.4 x 1e-6 / K	0.3 x 1e-6 / K	thin_film, 293 to 1273 K	placeholder	TO VERIFY	C, to verify
residual stress in-planepreferred	-0.9 GPa	0.5 GPa	thin_film, 293 to 293 K	placeholder, sputtered 0.3 Pa prior	TO VERIFY	C, to verify

Interfaces

Pair	Quantity	Value	Sigma	Method	Quality
Molybdenum / Sapphire, c-plane	G_c	8.5 J / m2	3.5	placeholder, Paper 3 wedge test pending	C, to verify

Chromium

Cr

metal, bcc, Im-3m, 7 190 kg / m3. Diffusion barrier. Measured crystallite 15 to 25 nm in Paper 3.

MP-cr
7 rows, 7 quality C, 3 measured in house

Quantity	Value	Sigma	Form, T window	Method	Source	Quality
Young's modulus in-planepreferred	279 GPa	12 GPa	thin_film, 293 to 1273 K	placeholder	TO VERIFY	C, to verify
Poisson ratiopreferred	0.21	0.01	thin_film, room T	placeholder	TO VERIFY	C, to verify
linear CTEpreferred	6.2 x 1e-6 / K	0.3 x 1e-6 / K	thin_film, 293 to 1273 K	placeholder	TO VERIFY	C, to verify
grain size in-planepreferred	15.5 nm	1.5 nm	thin_film, 293 to 293 K	GID Williamson-Hall, Royce, Aug 2026	Kawwam M et al	C, to verify
grain size out-of-plane	24.6 nm	2.5 nm	thin_film, 293 to 293 K	Scherrer, Royce, Aug 2026	Kawwam M et al	C, to verify
residual stress in-planepreferred	1.3 GPa	0.3 GPa	thin_film, 293 to 293 K	sapphire internal standard, Aug 2026	Kawwam M et al	C, to verify
yield strengthpreferred	1 200 MPa	300 MPa	thin_film, 293 to 293 K	placeholder, nanocrystalline film	TO VERIFY	C, to verify

Interfaces

Pair	Quantity	Value	Sigma	Method	Quality
Chromium / Nichrome 80/20	G_c	15 J / m2	6	placeholder	C, to verify

Nichrome 80/20

Ni-20Cr

alloy, fcc, 8 400 kg / m3. Seed layer for LPBF wetting.

MP-nicr-8020
4 rows, 4 quality C, 0 measured in house

Quantity	Value	Sigma	Form, T window	Method	Source	Quality
Young's modulus in-planepreferred	214 GPa	10 GPa	thin_film, 293 to 1073 K	placeholder	TO VERIFY	C, to verify
Poisson ratiopreferred	0.31	0.01	thin_film, room T	placeholder	TO VERIFY	C, to verify
linear CTEpreferred	13 x 1e-6 / K	0.5 x 1e-6 / K	thin_film, 293 to 1073 K	placeholder	TO VERIFY	C, to verify
yield strengthpreferred	1 000 MPa	200 MPa	thin_film, 293 to 293 K	placeholder, sputtered film	TO VERIFY	C, to verify

Interfaces

Pair	Quantity	Value	Sigma	Method	Quality
Chromium / Nichrome 80/20	G_c	15 J / m2	6	placeholder	C, to verify

Nickel

Ni

metal, fcc, Fm-3m, 8 908 kg / m3. Host for Cr diffusion data; interface partner for Al2O3/Ni.

MP-ni
3 rows, 3 quality C, 0 measured in house

Quantity	Value	Sigma	Form, T window	Method	Source	Quality
Young's moduluspreferred	200 GPa	8 GPa	bulk, 293 to 1073 K	placeholder	TO VERIFY	C, to verify
Poisson ratiopreferred	0.31	0.01	bulk, room T	placeholder	TO VERIFY	C, to verify
linear CTEpreferred	13.4 x 1e-6 / K	0.3 x 1e-6 / K	bulk, 293 to 1073 K	placeholder	TO VERIFY	C, to verify

Interfaces

Pair	Quantity	Value	Sigma	Method	Quality
Alumina, sintered / Nickel	G_c	8 J / m2	3	placeholder, four-point bend	C, to verify
Alumina, sintered / Nickel	psi	45°	0.1	placeholder, mode mixity at G_c, rad	C, to verify