. 2022 Apr 12;15(8):2832. doi: 10.3390/ma15082832

Table 1.

Actual chemical composition (at.%) of high-entropy or complex concentrated phases, namely bcc solid solutions (Nb_ss), tetragonal Nb₅Si₃ silicides, eutectics with Nb_ss and tetragonal Nb₅Si₃, A15-Nb₃X (X = Al,Ge,Si,Sn) compounds, and C14-NbCr₂ Laves phase, that can form in RM(Nb)ICs and RM(Nb)ICs/RCCAs, and the metallic UHTM. For nominal compositions of alloys see Appendix A. (AC = as cast, HT = heat treated).

Phase	Element													UHTM and Condition
Phase	Al	B	Cr	Ge	Hf	Mo	Nb	Si	Sn	Ta	Ti	V	W	UHTM and Condition
Nb_ss	5.6	-	6.8	-	5.3	-	36.6	1.6	2.7	-	32.8	8.7	-	NV1-AC
Nb_ss	6.7	-	10.9	-	3.7	-	35.9	1.7	4.7	-	36.4	-	-	EZ8-AC
Nb_ss	7.2	-	29.4	1.5	-	-	23.3	5.3	2.7	-	30.6	-	-	OHS1-AC
Nb_ss	8.6	-	19.1	1.2	2.3	-	26.4	2.4	3.5	3.6	31.4	-	1.5	JZ3-AC
Nb_ss	5.6	-	12.2	0.5	0.3	-	40.6	2.9	2.5	10.4	14.1	-	10.9	JZ3-AC
Nb_ss	1.5	-	7.1	-	-	-	30	2.1	0.4	15.1	3.9	-	39.8	JZ3⁺-HT
Nb_ss	5.3	-	17.7	1.6	0.3	23.4	21.2	-	1.2	-	11.3	-	18	JZ5-HT
Nb_ss	7	0.7	15.7	-	-	-	35.6	1.3	-	-	39.7	-	-	TT4-AC
Nb_ss	7.1	-	15.9	-	-	-	31.4	1.4	-	3.7	40.2	-	-	TT5-AC
Nb_ss	6.8	1.1	15.6	-	-	2.4	34.5	1.2	-	-	38.4	-	-	TT8-AC
Nb₅Si₃	3.2	-	1.4	-	-	-	38.3	34.9	-	4.5	17.7	-	-	KZ6-AC
Nb₅Si₃	3.5	-	2.2	-	-	1.5	35.7	30.6	-	-	26.5	-	-	JG2-HT
Nb₅Si₃	3.7	-	0.4	-	9.6	-	29.3	34.1	0.4	-	20.7	1.8	-	NV1-AC
Nb₅Si₃	4.1	-	1.8	-	10.3	-	25.7	32	1.4	-	24.6	-	-	EZ8-AC
Nb₅Si₃	5.2	-	1.9	6.7	-	-	38.8	20.6	3.8	-	23	-	-	OHS1-AC
Nb₅Si₃	4.6	-	3.5	6.9	1.6	-	37.3	23.1	2	4.5	15.9	-	0.6	JZ3-AC
Nb₅Si₃	4.6	-	3	5.6	0.9	-	39.2	23.8	4.2	4.9	13	-	0.8	JZ3⁺-HT
Nb₅Si₃	5.2	-	4	7.2	3.2	3.8	27.4	24.1	1.4	-	23.7	-	-	JZ5-HT
Nb₅Si₃	4	4.4	1.5	-	-	-	32.5	28.3	-	-	29.3	-	-	TT4-AC
Nb₅Si₃	3.9	5.4	2.2	-	-	-	25.4	27.7	-	2.6	32.8	-	-	TT5-AC
Nb₅Si₃	4.3	5.8	1.4	-	-	-	33	27.4	0.8	-	27.1	-	-	TT6-AC
Nb₅Si₃	3.3	8	0.9	-	-	0.5	30.7	26.4	-	-	30.2	-	-	TT8-AC
Nb₅Si₃	4.8	-	2.7	7.8	-	-	37.6	21	-	-	26.1	-	-	ZF6-HT
Nb₅Si₃	3.2	-	2.3	6.7	4.8	-	37	24.8	-	-	21.2	-	-	ZF9-HT
Nb₅Si₃	3.7	-	2.6	-	-	-	35.2	29.2	1.8	-	27.5	-	-	ZX8-HT
Phase	Element													UHTM and condition
Phase	Al	B	Cr	Ge	Hf	Mo	Nb	Si	Sn	Ta	Ti	V	W	UHTM and condition
eutectic	4.6	-	1.3	-	7.7	-	39.6	18.2	1.6	-	23.4	3.6	-	NV1-AC
eutectic	5.4	-	-	-	7.3	-	38.8	13.4	4.4	-	30.6	-	-	EZ5-AC
A15	7.2	-	16.5	4.3	2.6	-	26.8	9.8	3	3.2	25.6	-	1	JZ3-AC
A15	6.4	-	8.7	0.9	0.5	-	39.9	2.8	12.6	4.9	19.3	-	4	JZ3⁺-AC
A15	9.4	-	12	0.9	-	14.4	30	1.1	12.5	-	15.1	-	4.6	JZ4-AC
A15	7.1	-	9.5	1.2	-	14.3	39.4	2	10.3	-	10.6	-	5.6	JZ4-HT
A15	7.1	-	7.4	2.1	0.5	16.2	30.1	2.1	10.3	-	19.4	-	4.8	JZ5-AC
A15	10.5	-	14.1	1.4	0.4	15.5	19.1	0.8	11.6	-	22.7	-	3.9	JZ5-AC
A15	7.3	-	10.8	1.8	-	16.3	30.1	2.4	9.2	-	17.4	-	4.7	JZ5-HT
Laves	-	-	38.4	-	-	-	20.8	10.7	1.8	-	28.3	-	-	ZX4-AC
Laves	2.7	-	38.8	-	-	-	27	9.6	1.1	-	20.8	-	-	ZX8-AC
Laves	3.5	-	41.6	-	5.5	-	22.7	8.3	-	-	18.4	-	-	JG4-AC