# Copyright 2019 TerraPower, LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Yttrium Oxide"""
from armi.materials.material import Material
from armi.utils.units import getTk
[docs]class Y2O3(Material):
name = "Y2O3"
propertyValidTemperature = {"linear expansion percent": ((273.15, 1573.15), "K")}
def __init__(self):
Material.__init__(self)
self.refDens = 5.03
[docs] def setDefaultMassFracs(self):
self.setMassFrac("Y89", 0.7875)
self.setMassFrac("O16", 0.2125)
[docs] def linearExpansionPercent(self, Tk=None, Tc=None):
"""
Return the linear expansion percent for Yttrium Oxide (Yttria).
Notes
-----
From Table 5 of "Thermal Expansion and Phase Inversion of Rare-Earth Oxides.
"""
Tk = getTk(Tc, Tk)
self.checkPropertyTempRange("linear expansion percent", Tk)
return 1.4922e-07 * Tk ** 2 + 6.2448e-04 * Tk - 1.8414e-01