Table 1.

Critical load values.

Specimen Condition	Critical Load [N]
	Lc1	Lc2
600 °C/24 h	39	75
600 °C/72 h	35	75
700 °C/24 h	34	67
700 °C/72 h	47	81
800 °C/2 h	50	82
800 °C/6 h	63	85