From 976cfd501a39927e99beb54e6ceb927ff4fad77c Mon Sep 17 00:00:00 2001 From: Martin Diehl Date: Sun, 8 Jan 2023 12:00:55 +0100 Subject: [PATCH] thermal expansion coefficients for SiC this material was the initial motivation for adding fourth order polynomials, but I could not find a reliable source for the graphs send to damask@mpie.de. It seems that the CTE levels off for even higher temperature which calls for a higher order polynomial --- PRIVATE | 2 +- .../eigen/thermalexpansion_SiC-alpha.yaml | 16 ++++++++++++++++ .../eigen/thermalexpansion_SiC-beta.yaml | 12 ++++++++++++ 3 files changed, 29 insertions(+), 1 deletion(-) create mode 100644 examples/config/phase/mechanical/eigen/thermalexpansion_SiC-alpha.yaml create mode 100644 examples/config/phase/mechanical/eigen/thermalexpansion_SiC-beta.yaml diff --git a/PRIVATE b/PRIVATE index b258fe86c..547bfe56d 160000 --- a/PRIVATE +++ b/PRIVATE @@ -1 +1 @@ -Subproject commit b258fe86c2fb4bc74e5649a100328a38bcb3c997 +Subproject commit 547bfe56d67cba358a7bb9582f2f7c0e344befd8 diff --git a/examples/config/phase/mechanical/eigen/thermalexpansion_SiC-alpha.yaml b/examples/config/phase/mechanical/eigen/thermalexpansion_SiC-alpha.yaml new file mode 100644 index 000000000..52bb982d5 --- /dev/null +++ b/examples/config/phase/mechanical/eigen/thermalexpansion_SiC-alpha.yaml @@ -0,0 +1,16 @@ +type: thermalexpansion + +references: + - Z. Li and R.C. Bradt, + Journal of the American Ceramic Society 69(12):863-866, 1986, + https://doi.org/10.1111/j.1151-2916.1986.tb07385.x + +Alpha_11: 3.27e-6 +Alpha_11,T: 3.25e-9 +Alpha_11,T^2: -1.36e-12 + +Alpha_33: 3.18e-6 +Alpha_33,T: 2.48e-9 +Alpha_33,T^2: -8.51e-13 + +T_ref: 273.15 diff --git a/examples/config/phase/mechanical/eigen/thermalexpansion_SiC-beta.yaml b/examples/config/phase/mechanical/eigen/thermalexpansion_SiC-beta.yaml new file mode 100644 index 000000000..6c521472a --- /dev/null +++ b/examples/config/phase/mechanical/eigen/thermalexpansion_SiC-beta.yaml @@ -0,0 +1,12 @@ +type: thermalexpansion + +references: + - Z. Li and R.C. Bradt, + Journal of Materials Science 21:4366-4368, 1986, + https://doi.org/10.1007/BF01106557 + +Alpha_11: 3.19e-6 +Alpha_11,T: 3.60e-9 +Alpha_11,T^2: -1.68e-12 + +T_ref: 273.15