If you want to see all the objects/properties use:
Get-NcVol -Name {volume_name} -Vserver {vServer_name} | Format-List
You'll see a "VolumeIdAttributes" object - to see the additional properties for the volume
(Get-NcVol -Name {volume_name} -Vserver {vServer_name}).VolumeIdAttributes
Finally, try this:
PS C:\> $vol=Get-NcVol {volume_name} -Vserver {vServer_name}
PS C:\> $vol.VolumeIdAttributes.CreationTimeDT
Sunday, November 25, 2018 5:07:40 PM