  The studies on the origination and generation mechanisms of ICME materials
are crucial for understanding the connection between CMEs and flares. The
materials inside ICMEs can be classified into three types, coming from corona
directly (corona-materials), heated by magnetic reconnection in corona
(heated-corona-materials), and generated by chromospheric evaporation
(chromospheric-evaporation-materials). Here, the contribution and First
Ionization Potential (FIP) bias of three types of materials inside ICMEs
associated with different flare intensities are analyzed and compared. We find
that the speeds and scales of near-Earth ICMEs both increase with flare
intensities. The proportions of heated-corona-materials are nearly constant
with flare intensities. The contributions of corona-materials
(chromospheric-evaporation-materials) are significantly decreased (increased)
with flare intensities. More than two-thirds of materials are
chromospheric-evaporation-materials for ICMEs associated with strong flares.
The FIP bias of corona-materials and heated-corona-materials is almost the
same. The FIP bias of chromospheric-evaporation-materials is significantly
higher than that of corona-materials and heated-corona-materials, and it is
increased with flare intensities. The above characteristics of FIP bias can be
explained reasonably by the origination and generation mechanisms of three
types of ICME materials. The present study demonstrates that the origination
and generation mechanisms of ICME materials are significantly influenced by
flare intensities. The reasons for the elevation of FIP bias, if ICMEs are
regarded as a whole, are that the FIP bias of
chromospheric-evaporation-materials is much higher, and the
chromospheric-evaporation-materials contributed significantly to the ICMEs
which associated with strong flares.
