TABLE 5.

Linear expression for the ratio C_p / ε_T of specific heat C_p and total hemispherical emissivity ε_T of Fe_0.72Cr_wNi_(0.28−w) melts with Cr mass fraction w_Cr at pressure p = 5.0 × 10⁻⁵ Pa.^a The C_p / ε_T is expressed by a linear function of temperature T with C_p / ε_T = C_p / ε_T at T_L − k₁ (T − T_L). T_l is the liquidus temperature and k₁ is the temperature coefficient. The ε_T at T_L is calculated from the relation of C_p / ε_T and C_p.

wCr	TL/K	T range /K	Cp / εT at TL /J K−1 mol−1	k1 /J K−2 mol−1	εT at TL
0.07	1746.54b	1632 – 1824	150.68 ± 3.219c	0.101 ± 0.0055c	0.293 ± 0.0063c
0.09	1745.94	1625 – 1833	151.78 ± 4.205	0.098 ± 0.0055	0.291 ± 0.0081
0.11	1744.32	1653 – 1829	152.38 ± 2.831	0.088 ± 0.0053	0.290 ± 0.0054
0.12	1743.07	1676 – 1836	153.51 ± 3.669	0.090 ± 0.0057	0.287 ± 0.0069
0.14	1739.57	1686 – 1846	154.93 ± 4.864	0.042 ± 0.0054	0.284 ± 0.0089
0.16	1734.57	1690 – 1826	154.93 ± 2.554	0.037 ± 0.0050	0.284 ± 0.0047

^aStandard uncertainties u are u(w_Fe) = 0.0019, 0.0013, 0.0009, 0.0014, 0.0015, 0.002 and u(w_Cr) = 0.0012, 0.0032, 0.0009, 0.0009, 0.0013, 0.001 and u(w_Ni) = 0.0013, 0.0015, 0.0009, 0.0011, 0.0016, 0.0017 for each Cr mass fraction of 0.07, 0.09, 0.11, 0.12, 0.14, 0.16 respectively, u(T) = 2 K, and u(p) = 3.2 × 10⁻⁸ Pa.

^bThe T_L of each composition was obtained in ThermoCalc (2017b) software using FEDEMO database.

^cStandard uncertainty.