A combustor assembly (108; 208; 308), comprising: a liner (110; 210, 215; 310) arranged within a combustion chamber (106; 206; 306), the combustion chamber (106; 206; 306) extending in an axial direction between a bulkhead and an outlet, the liner (110; 210; 215; 310) including: a first portion (114; 214; 314) extending substantially in the axial direction, a second portion (116; 216; 316) extending substantially in the axial direction, the first portion (114; 214; 314) axially forward of the second portion (116; 216; 316) towards the bulkhead, a step (120; 220; 320) connecting the first portion (114; 214; 314) and the second portion (116; 216; 316), the step (120; 220; 320) arranged at an angle (θ) to the second portion (116; 216; 316) that is less than 90°, the angle (θ) defined as the axially forward angle formed between the step (120; 220; 320) and a reference line tangential to the second portion (116; 216; 316) on a side of the reference line facing into the combustion chamber (106; 206; 306), the step (120; 220; 320) having a step height defined as a distance between the first portion (114; 214; 314) and the second portion (116; 216; 316), and a plurality of slots (140; 240; 340; 440) spaced circumferentially around the chamber extend through the step (120; 220; 320), wherein the first portion (114; 214; 314), the second portion (116; 216; 316), and the step (120; 220; 320) are formed as a unitary ceramic component, characterized in that a ratio of a height of the slots (140, 240, 340, 440) to the height of the step (120; 220; 320) is greater than 0.66, and in that a width of the slots (140, 240, 340, 440) is greater than a distance between adjacent slots (140, 240, 340, 440). a liner (110; 210, 215; 310) arranged within a combustion chamber (106; 206; 306), the combustion chamber (106; 206; 306) extending in an axial direction between a bulkhead and an outlet, the liner (110; 210; 215; 310) including: a first portion (114; 214; 314) extending substantially in the axial direction, a second portion (116; 216; 316) extending substantially in the axial direction, the first portion (114; 214; 314) axially forward of the second portion (116; 216; 316) towards the bulkhead, a step (120; 220; 320) connecting the first portion (114; 214; 314) and the second portion (116; 216; 316), the step (120; 220; 320) arranged at an angle (θ) to the second portion (116; 216; 316) that is less than 90°, the angle (θ) defined as the axially forward angle formed between the step (120; 220; 320) and a reference line tangential to the second portion (116; 216; 316) on a side of the reference line facing into the combustion chamber (106; 206; 306), the step (120; 220; 320) having a step height defined as a distance between the first portion (114; 214; 314) and the second portion (116; 216; 316), and a plurality of slots (140; 240; 340; 440) spaced circumferentially around the chamber extend through the step (120; 220; 320), a first portion (114; 214; 314) extending substantially in the axial direction, a second portion (116; 216; 316) extending substantially in the axial direction, the first portion (114; 214; 314) axially forward of the second portion (116; 216; 316) towards the bulkhead, a step (120; 220; 320) connecting the first portion (114; 214; 314) and the second portion (116; 216; 316), the step (120; 220; 320) arranged at an angle (θ) to the second portion (116; 216; 316) that is less than 90°, the angle (θ) defined as the axially forward angle formed between the step (120; 220; 320) and a reference line tangential to the second portion (116; 216; 316) on a side of the reference line facing into the combustion chamber (106; 206; 306), the step (120; 220; 320) having a step height defined as a distance between the first portion (114; 214; 314) and the second portion (116; 216; 316), and a plurality of slots (140; 240; 340; 440) spaced circumferentially around the chamber extend through the step (120; 220; 320), wherein the first portion (114; 214; 314), the second portion (116; 216; 316), and the step (120; 220; 320) are formed as a unitary ceramic component, characterized in that a ratio of a height of the slots (140, 240, 340, 440) to the height of the step (120; 220; 320) is greater than 0.66, and in that a width of the slots (140, 240, 340, 440) is greater than a distance between adjacent slots (140, 240, 340, 440). characterized in that a ratio of a height of the slots (140, 240, 340, 440) to the height of the step (120; 220; 320) is greater than 0.66, and in that a width of the slots (140, 240, 340, 440) is greater than a distance between adjacent slots (140, 240, 340, 440).