7) A nickel engine part is coated with SiC to provide corrosion resistance at high temperatures. If no residual stresses are present in the part at 20C, a) Determine the thermal stresses in MPa (tensile or Compressive) that develop when the part is heated to (O) C during use. b) Will the coating crack? - Linear expansion coefficient of Nickel: 13 x 106 1/C Linear expansion coefficient of SiC is 4.3 x 10-6 1/C. - The tensile strength of SiC is 180 MPa and elastic modulus of SiC is 413 GPa.