Process for producing a metal foam body, comprising the following steps: (a) providing a metal foam body A consisting of two metallic components, where these metallic components may be in the form either of (i) an alloy or (ii) an arrangement of two superposed layers of the two individual metallic components, in which case one of the metallic components forms the inner layer of the metal foam and the other metallic component the outer layer of the metal foam, wherein, in the case of alternative (i), the metallic components in the form of an alloy are selected from the list of the following combinations: nickel and cobalt, nickel and copper, wherein, in the case of alternative (ii), the metallic components are selected from the list of the following combinations: nickel on the inside and cobalt on the outside, nickel on the inside and copper on the outside, iron on the inside and nickel on the outside, and (b) applying a metal-containing powder MP to metal foam body A so as to obtain metal foam body AX, wherein the metal-containing powder MP is either a mixture of aluminium powder and chromium powder or a mixture of aluminium powder and molybdenum powder or a pulverulent alloy composed of either aluminium and chromium, or a pulverulent alloy composed of aluminium and molybdenum, (c) treating metal foam body AX thermally in order to achieve alloy formation between the metallic components of metal foam body A and the metal-containing powder MP so as to obtain metal foam body B, wherein the highest temperature of the thermal treatment of metal foam body AX is in the range from 680 to 715°C, and wherein the total duration of the thermal treatment in the temperature range from 680 to 715°C is between 5 and 240 seconds. (a) providing a metal foam body A consisting of two metallic components, where these metallic components may be in the form either of (i) an alloy or (ii) an arrangement of two superposed layers of the two individual metallic components, in which case one of the metallic components forms the inner layer of the metal foam and the other metallic component the outer layer of the metal foam, wherein, in the case of alternative (i), the metallic components in the form of an alloy are selected from the list of the following combinations: nickel and cobalt, nickel and copper, wherein, in the case of alternative (ii), the metallic components are selected from the list of the following combinations: nickel on the inside and cobalt on the outside, nickel on the inside and copper on the outside, iron on the inside and nickel on the outside, and (b) applying a metal-containing powder MP to metal foam body A so as to obtain metal foam body AX, wherein the metal-containing powder MP is either a mixture of aluminium powder and chromium powder or a mixture of aluminium powder and molybdenum powder or a pulverulent alloy composed of either aluminium and chromium, or a pulverulent alloy composed of aluminium and molybdenum, (c) treating metal foam body AX thermally in order to achieve alloy formation between the metallic components of metal foam body A and the metal-containing powder MP so as to obtain metal foam body B, wherein the highest temperature of the thermal treatment of metal foam body AX is in the range from 680 to 715°C, and wherein the total duration of the thermal treatment in the temperature range from 680 to 715°C is between 5 and 240 seconds.