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The studies on the origination and generation mechanisms of ICME materialsare crucial for understanding the connection between CMEs and flares. Thematerials inside ICMEs can be classified into three types, coming from coronadirectly (corona-materials), heated by magnetic reconnection in corona(heated-corona-materials), and generated by chromospheric evaporation(chromospheric-evaporation-materials). Here, the contribution and FirstIonization Potential (FIP) bias of three types of materials inside ICMEsassociated with different flare intensities are analyzed and compared. We findthat the speeds and scales of near-Earth ICMEs both increase with flareintensities. The proportions of heated-corona-materials are nearly constantwith flare intensities. The contributions of corona-materials(chromospheric-evaporation-materials) are significantly decreased (increased)with flare intensities. More than two-thirds of materials arechromospheric-evaporation-materials for ICMEs associated with strong flares.The FIP bias of corona-materials and heated-corona-materials is almost thesame. The FIP bias of chromospheric-evaporation-materials is significantlyhigher than that of corona-materials and heated-corona-materials, and it isincreased with flare intensities. The above characteristics of FIP bias can beexplained reasonably by the origination and generation mechanisms of threetypes of ICME materials. The present study demonstrates that the originationand generation mechanisms of ICME materials are significantly influenced byflare intensities. The reasons for the elevation of FIP bias, if ICMEs areregarded as a whole, are that the FIP bias ofchromospheric-evaporation-materials is much higher, and thechromospheric-evaporation-materials contributed significantly to the ICMEswhich associated with strong flares.

The contribution and FIP bias of three types of materials inside ICMEs associated with different flare intensities